#Incubation and infectious period, asymptomatic or presymptomatic #transmission and transmission route in #human-to-human spread of #hantavirus #infection (UKHSA, summary)

 

{Summary)

Main messages 

    1. This systematic evidence summary (search up 1 May 2026) identified and summarised evidence relating to the incubation and infectious period, asymptomatic or presymptomatic transmission and transmission route in human-to-human transmission of hantavirus infection.  

    2. Human-to-human transmission was only reported for Andes virus.  

    3. Seventeen studies were identified to include (1 to 17). All studies were from South America (Argentina, Chile, Paraguay or Uruguay) from 1995 to 2024. Three sets of studies clearly reported on the same outbreak.  

    4. Seven studies reported the incubation period, or enough information to calculate the incubation period of Andes virus (4, 6, 8, 10, 12, 13, 15, 17). Four of these reported overlapping evidence, (4, 8, 12, 17) leaving 5 independent reports. The reported incubation period ranged from 9 to 40 days, with studies reporting a mean between 21.6 to 27.5 days.   

    5. Three studies reporting incubation period included children (6, 10, 12). When evidence for children was separated, the range was 14 to 26 days. The mean (and standard deviation, SD) from one study with data to calculate it was 19.8 days (3.7) in children and 21.9 days (7.4) in adults (12). The available evidence was insufficient to determine if there was a significant difference between adults and children and not all studies separated the results.   

    6. Twelve studies reported the serial interval or enough information to calculate the serial interval of Andes virus (1, 2, 5, 9 to 14, 16, 17). Four of these reported overlapping evidence,(10, 11, 14, 17) leaving 10 independent reports. The reported serial interval ranged from 4 to 40 days with means across studies from 19.6 to 25.7 days.  

    7. Six studies reporting serial interval included children (2, 5, 9, 10, 12, 16). When evidence for children was separated, the range was 16 to 29 days. The mean (and SD) from one study with data to calculate it was 19.7 (3.5) in children and 19.5 (8.1) in adults. The available evidence was insufficient to determine if there was a significant difference between adults and children and not all studies separated the results.  

    8. None of the studies reported confirmed route of transmission. Some hypothesised routes from exposures including the possibility of respiratory, direct contact via breastfeeding, other direct contact and sexual transmission. None ruled out respiratory or fomite transmission alongside other possible routes.  

    9. No studies reported evidence of asymptomatic or presymptomatic transmission. 

    10. Most studies included groups identified as being at risk of health inequalities, including children, pregnant women, people living in rural settings and people in occupations at higher risk of exposure such as agricultural workers or farmers and people working in healthcare settings. However, none of the studies provided a comparison between groups and it was not possible to determine if outcomes differed in these groups. 

    11. Critical appraisal was not performed, which restricts the interpretation of the findings, but important limitations have been highlighted. There were a limited number of cases with likely human-to-human transmission which limits the generalisability of the evidence. Many studies also highlighted the possibility than some of these cases also had environmental exposure, although human-to-human transmission was most likely. All studies rely on selfreport of exposure and symptom onset dates, which may be subject to recall bias or misreporting. There was also discrepancy between some studies reporting on the same cases, which highlights the likelihood of misreporting of this evidence.  

    12. In summary, there was evidence from a limited number of cases to provide information of the incubation period and serial interval for human-to-human transmission of Andes virus. There was no information available that directly informed the infectious period in humans. Evidence suggested incubation period could range from 9 to 40 days, with studies reporting a mean between 21.6 to 27.5 days. The reported serial interval ranged from 4 to 40 days with means from 19.6 to 25.7 days. Although no studies were able to confirm route of transmission, some proposed routes through exposures, including the possibility of direct contact via breast-feeding, and sexual transmission or contact. No studies reported evidence of asymptomatic or presymptomatic transmission. All of the evidence is at risk of bias from misreport or recall bias, possible environmental exposure and ability to generalise due to small numbers of cases. 

(...)

Source: 

Link: https://www.gov.uk/government/publications/hantavirus-human-to-human-infection-transmission-parameters

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#HK PRC SAR, CHP investigates a #human case of #influenza #H9 #infection (June 12 '26)

 

    The Centre for Health Protection (CHP) of the Department of Health (DH) is today (June 12) investigating a case of human infection with influenza A (H9) in collaboration with relevant departments. 

    The patient is a two-year-old boy. His condition has remained mild and he is currently in stable condition. 

    The CHP will send a letter to all doctors in Hong Kong to update them on the latest developments regarding avian influenza A and to urge them to remain vigilant and report any suspected cases.

 

Case information

    The boy lives in Sha Tin District. He developed a fever and mild diarrhoea on June 9. On the following day (June 10), he was brought to Prince of Wales Hospital and was admitted for treatment. His clinical specimen tested positive for the influenza A (H9) virus by the Public Health Laboratory Services Branch (PHLSB) of the CHP. The subtyping result is pending. His clinical diagnosis was novel influenza. He is currently in stable condition and has been admitted to an isolation ward at Princess Margaret Hospital for treatment.

      The CHP's preliminary investigation revealed that the patient had no travel history during the incubation period. 

    The case has been classified as a locally acquired case. 

    The patient does not attend school or receive daycare services. 

    He is primarily cared for by his family members and spends most of his time at home or nearby. 

    His household does not keep poultry. 

    According to information provided by his family members, he has neither consumed undercooked poultry nor come into contact with any patients. 

    In early June, one of his family members took him to Wo Che Market on two occasions. During these visits, the patient stayed at a fresh provision shop in the market that sells live chickens to watch the poultry and touched the surroundings of the fresh provision shop. 

    The CHP conducted an investigation with the Food and Environmental Hygiene Department (FEHD) and collected environmental samples from the shop concerned. 

    The shop staff remained asymptomatic. 

    The patient has six household contacts and they remain asymptomatic so far. 

    The CHP has provided them with preventive medication and put them under medical surveillance.

      The CHP is continuing to investigate the source of infection of the case and is conducting whole genome sequencing of the virus sample. The CHP will also report the case to the World Health Organization (WHO).

      Humans are primarily infected with the influenza A virus through direct contact with infected poultry or through indirect contact with environments contaminated by their droppings. 

    The CHP's epidemiological investigation indicated that the patient had visited a location where live poultry was sold. It cannot be ruled out that the patient was infected through indirect contact with a contaminated environment at the wet market. 

    As young children have weaker immune systems and are incapable of maintaining good hand hygiene, the CHP advised parents to avoid taking young children to places where live poultry is sold. 

    Transporting poultry may contaminate the ground and the surrounding environment. 

    As young children are shorter in height and easy to be in contact with the surrounding environment, they are at greater risk of coming into contact with poultry droppings or contaminated areas.

      In the past ten years, the WHO has received reports of a total of over 160 cases of human infection with influenza A (H9) worldwide. 

    To date, most case of human infection with influenza A (H9) have presented with only mild clinical illness. 

    According to the WHO's risk assessment, the influenza A (H9) virus has not acquired the ability for sustained human-to-human transmissions.

 

Government's comprehensive follow-up actions

    Novel influenza A infection, including influenza A (H9), is a notifiable infectious disease in Hong Kong. 

    Compared to other highly pathogenic avian influenza strains such as H5N1 and H7N9, influenza A (H9) is a low-pathogenic avian influenza strain that causes milder illness. 

    Excluding the aforementioned case, 10 cases of influenza A (H9N2) have been reported since 1999, including four locally acquired cases and six imported cases. 

    No deaths have been recorded so far. 

    In response to the latest local case, the CHP will issue a letter to all doctors in Hong Kong, reminding them of the latest situation of influenza A (H9), and urging them to remain vigilant and report any suspected cases.

      Sporadic cases of human infection with avian influenza occur from time to time internationally. Although the current risk of an outbreak is low, the Hong Kong Special Administrative Region Government has consistently implemented preventive measures, including a disease surveillance system, the implementation of livestock control measures at farms, markets and ports, in order to prevent avian influenza.

      The PHLSB of the CHP comprises laboratories with high biosafety standards, capable of conducting, testing for high-risk pathogens, and which also possess sufficient testing and genetic analysis capabilities and facilities. Hong Kong currently has sufficient reserve of antiviral medications.

 

Preventive measures to be taken by the public

    Humans are primarily infected with the avian influenza A virus through contact with infected birds, poultry or other animals (whether alive or dead), or through surfaces or environments contaminated with saliva, mucous and animal faeces (such as wet markets and live poultry markets). 

    The virus has very low transmissibility among humans. People who have close contact with live poultry are more susceptible to contracting avian influenza. The elderly, children and people with chronic illnesses have a higher risk of developing complications such as bronchitis and pneumonia, if infected. 

    Members of the public should remain vigilant and take the following measures to prevent avian influenza:

         ° Avoid contact with poultry, birds or their droppings. If contact has been made, thoroughly wash hands with soap and water;

        ° Poultry and eggs should be thoroughly cooked before eating;

        ° Perform hand hygiene at all times, especially before touching the mouth, nose or eyes; after contact with animals or their living environments; after touching public installations such as handrails or doorknobs; or when hands are contaminated with respiratory secretions, such as after coughing or sneezing;

        ° Cover the mouth and nose with tissue paper when sneezing or coughing. Dispose of soiled tissues into a lidded rubbish bin, then wash hands thoroughly;

        ° When having respiratory symptoms, wear a surgical mask, do not go to work or school, avoid crowded places and seek medical advice promptly;

        ° Avoid crowded public places or areas with poorly ventilated; high-risk individuals may consider putting on a surgical mask when staying in such places; and

        ° Travellers returning to Hong Kong from areas affected by avian influenza outbreaks should consult doctors promptly if they have flu-like symptoms, and inform the doctor of the recent travel history and wear a surgical mask to help prevent spreading of the disease.

    The public may visit the CHP's webpages for more information: Avian Influenza Webpage, Avian Influenza Report, Avian influenza statistics and affected areas around the world, Facebook page and Youtube channel. 

 

Ends/Friday, June 12, 2026 | Issued at HKT 22:19 | NNNN

Source: 

Link: https://www.info.gov.hk/gia/general/202606/12/P2026061200852.htm?fontSize=1

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Twenty-one #countries launch coordinated #Andes virus #research initiative following #hantavirus #outbreak (WHO, June 12 '26)

 

    Following the recent Andes virus (ANDV) outbreak linked to the MV Hondius cruise ship, a globally coordinated outbreak research initiative involving investigators and institutions across 21 countries has begun implementation,  demonstrating how international research preparedness systems can be rapidly activated during health emergencies.

    The initiative, known as NAVIS, is a natural history study designed to improve understanding of ANDV transmission dynamics, incubation periods, immune responses, viral kinetics, and determinants of severe disease through harmonized longitudinal follow-up of exposed individuals.

    The study will use a harmonized prospective protocol, which was developed by Hospital Germans Trias i Pujol, Badalona, Spain, for immediate deployment after an emergency scientific consultation coordinated through the UK Health Security Agency (UKHSA)-led Hantavirus Collaborative Open Research Consortium (CORC) mobilized more than 1600 experts from over 130 countries to identify urgent scientific priorities and coordinate international research activities.

    “Closing gaps in our scientific knowledge is key to the development of medical countermeasures, and through international coordination we ensure this is accelerated. Preparedness, therefore, must include the ability to rapidly generate scientific evidence during outbreaks, not only respond to them,” said Yper Hall of the UKHSA.

    By using standardized approaches across countries, NAVIS aims to generate comparable datasets to better understand the pathogen and inform the development of medical countermeasures like tests, treatments and vaccines.

    Coordination of the NAVIS platform is being supported by ANRS Emerging Infectious Diseases (ANRS-MIE) under BE READY, a EU-funded global initiative to strengthen research preparedness and rapid scientific mobilization for future epidemics and pandemics. The study will use ISARIC (International Severe Acute Respiratory and Emerging Infection Consortium), an adaptable research framework designed to enable rapid, standardized data and sample collection during emerging infectious disease outbreaks.

    Participating countries include: 

    ° Australia, 

    ° Belgium, 

    ° Canada, 

    ° Democratic Republic of the Congo, 

    ° Denmark, 

    ° France, 

    ° Germany, 

    ° Greece, 

    ° Ireland, 

    ° Italy, 

    ° Japan, 

    ° the Netherlands, 

    ° New Zealand, 

    ° Singapore, 

    ° South Africa, 

    ° Spain, 

    ° Switzerland, 

    ° Türkiye, 

    ° the United Kingdom and 

    ° the United States.

    Participating institutions include leading infectious disease, clinical research, and public health centres such as the Australian Centre for Disease Control, Sinai Health System, Institut National de la Recherche Médicale (Inserm), Hellenic Pasteur Institute, University College Dublin, National Centre for Infectious Diseases, University Hospital Zurich, University of Liverpool, and Emory University, among others.

    “The rapid launch of NAVIS across 21 countries shows what is possible when research networks are established before outbreaks occur,” commented Yazdan Yazdanpanah of ANRS-MIE.

    NAVIS represents a practical example of outbreak research preparedness under the World Health Organization’s R&D Blueprint, which establishes research networks for pathogen families, to support rapid scientific coordination and implementation of outbreak research before emergencies emerge.

    Outbreaks such as that of the ANDV present rare opportunities for scientific investigation, with a limited window of time for generating robust evidence. Without rapid coordination and harmonized protocols, opportunities to better understand the pathogen can be lost.

    “Scientific evidence generation during outbreaks must become operational, coordinated, and immediately deployable. Future outbreak responses should begin by activating research systems that already exist rather than trying to build them during crises,” said Sylvie Briand, Chief Scientist at WHO.

    The initiative also highlights the importance of geographically-distributed research preparedness. Countries and regions where outbreaks emerge or pathogens circulate must be central participants in evidence generation through strengthened clinical trial networks, national ethics committees, laboratory systems, surveillance platforms, and outbreak research infrastructure.

    The ANDV outbreak demonstrated the importance of research preparedness. Future outbreak responses should no longer begin by building research systems during crises. They should begin by activating systems that already exist.

Source: 

Link: https://www.who.int/news/item/12-06-2026-twenty-one-countries-launch-coordinated-andes-virus-research-initiative-following-hantavirus-outbreak

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#USA, #Wastewater Data for Avian #Influenza #H5 (CDC, June 12 '26)

 

{Excerpt}

(...)

Time Period: May 31, 2026 - June 06, 2026

    -- A(H5) Detection: 3 site(s) (0.7%)

    -- No Detection: 440 site(s) (99.3%)

    -- No samples: 52 site(s)

{Click on Image to Enlarge}

(...)

Source: 

Link: https://www.cdc.gov/wastewater/emerging-viruses/h5.html?

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#Surveillance of West Nile Virus #WNV #infections in #human in #Europe, Weekly Report (ECDC, June 12 '26)

 

Week 24, 2026

Produced on 11 June 2026 at 08:15 based on data submitted up to 10 June 2026

Epidemiological summary

    Since the beginning of 2026, and as of 10 June, 1 country in Europe reported 1 human case of West Nile virus infection: North Macedonia.

    The current report in Table 1 includes the number of probable and confirmed cases of WNV infections per NUTS3 region. However, these figures are preliminary and should be interpreted with caution as they may be revised by the countries as more information becomes available. Consequently, no totals are provided. For further details on case numbers, please refer to the joint monthly report, which offers a more detailed analysis.

    Please note: The table and map in this report contain countries and areas where human West Nile virus infection cases were reported to EpiPulse Cases.

Introduction

    The European Centre for Disease Prevention and Control (ECDC) provides a weekly overview of human cases of West Nile virus (WNV) infection to support the competent authorities responsible for blood safety. This overview can aid decisions on the deferral or testing of blood donors who may have been exposed to the virus, in accordance with Commission Directives 2004/33/EC and 2014/110/EU.

    West Nile virus infection in humans is a notifiable disease at the EU level and cases are reported in accordance with the EU case definition. The table and map in this report show the countries and areas where human cases of WNV infection have been reported to the European surveillance portal for infectious diseases (EpiPulse Cases).

    More information on the occurrence of WNV infection among humans in Europe, as well as WNV outbreaks among equids and birds, is available in the joint monthly report produced by ECDC and the European Food Safety Authority (EFSA).

    Here we present the weekly report as of 10 June 2026.

Overview of West Nile virus cases in EU/EEA and EU-neighbouring countries

{Country - Affected Region - Probable - Confirmed - Total Cases}

    ° North Macedonia - Vardarski - 0 - 1 - 1

(...)

Source: 

Link: https://wnv-weekly.ecdc.europa.eu/

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#Andes #hantavirus #outbreak in cruise ship (ECDC, June 11 '26): 1 case reclassified from probable to confirmed

 

    This page is updated as more information becomes available. It was last updated 11 June at 13:05.

    On 2 May 2026, ECDC was notified of a cluster of severe respiratory illness on MV Hondius, a Dutch-flagged cruise ship with passengers and crew from 23 countries, including nine EU/EEA countries. 

    The virus has been identified as Andes hantavirus.

    As of 11 June 2026, 13 cases have been reported in total, including 12 confirmed and one probable case.

    Since the last update on 26 May 2026, one of the previously reported probable cases was reclassified as confirmed following positive laboratory result for hantavirus infection.

    The identification of additional cases after former passengers and crew returned to their home country is possible given the long incubation period of Andes hantavirus and the possibility that some infections occurred on board on the ship. 

    The risk to the EU/EEA general population remains very low.

    ° Confirmed cases: 12

    ° Probable cases: 1

    ° Suspected cases: 0

    ° Number of deaths: 3

(...)

Source: 

Link: https://www.ecdc.europa.eu/en/infectious-disease-topics/hantavirus-infection/surveillance-and-updates/andes-hantavirus-outbreak

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#UK Health Security Agency #update on the #hantavirus cruise ship #outbreak (June 10 '26): a probable case was retrospectively lab confirmed

 

Latest update

    UKHSA continues to work closely with partners in response to the hantavirus outbreak.

    UKHSA laboratories have confirmed a positive hantavirus test result for an individual in Tristan de Cunha, who was previously considered a probable case by WHO with exposure on MV Hondius. 

    This is not a new case.

    The samples were collected in May and the individual is now clinically well at home in Tristan de Cunha.

    All necessary public health actions have been carried out. 

    There is no change to the public health risk to the UK population from Hantavirus, which remains very low.

Source: 

Link: https://www.gov.uk/government/news/ukhsa-update-on-the-hantavirus-cruise-ship-outbreak

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Rapid #Risk #Assessment: #Ebola #Bundibugyo virus disease, #DRC, #Uganda (#WHO, June 9 '26, summary)

 

Date and version of current assessment: 06 June 2026, v3  

Date(s) and version(s) of previous assessment(s): 15 May 2026, V1; 22 May 2026,V2 

Risk statement

    Following the publication of the second Rapid Risk Assessment (RRA) on 22 May 2026, the Bundibugyo virus disease (BVD) outbreak has continued to expand, particularly in the Democratic Republic of the Congo and, to a lesser extent, in Uganda. 

    During this period, a case was reported in a Congolese national who travelled from the Democratic Republic of the Congo, via Uganda, to the United Arab Emirates and then back to Uganda. 

    WHO is working with public health authorities in the United Arab Emirates and Uganda to gather additional information to assess the risk of exposure and facilitate contact tracing through the National International Health Regulations (IHR) Focal Point mechanism. 

    Following notification of the case, the United Arab Emirates authorities rapidly implemented risk assessment, contact tracing activities, follow-up of identified contacts, public health investigations, enhanced preparedness measures at points of entry, and coordination with relevant national and international partners. 

    Epidemiological investigations to date have not identified any secondary cases, local transmission, or evidence of onward spread in the country.   

    Additionally, as of 6 June, the outbreak in the Democratic Republic of the Congo has expanded considerably; the number of reported affected health zones has increased from 16 to 25, while the number of laboratory-confirmed cases increased from 63 to 515 and the number of confirmed deaths from four to 91 (CFR 17.7%). 

    The increase in the number of confirmed cases reflects both ongoing transmission and improvements in case detection through expanded testing and intensified contact tracing activities. 

    The number of reported suspected cases decreased from 661 to 117 following the testing of a backlog of samples and subsequent reclassification of suspected cases to either confirmed cases or noncases. 

    So far, at least 16 healthcare workers are among the confirmed cases. 

    Cases have been reported across all age groups, with most occurring among adults aged 20–49 years, and a slightly higher proportion among males. 

    To date, 12 patients have recovered. 

    The outbreak has also expanded geographically, with transmission reported in additional health zones in Ituri and North Kivu provinces. 

    The outbreak is now reported across 25 health zones in Ituri (17), North Kivu (seven), and South Kivu (one) provinces, with new affected areas identified in both Ituri and North Kivu.  

    In Uganda, as of 6 June, the number of reported confirmed cases increased from two to 19 (14 imported and five acquired in Uganda), including two deaths in imported cases. 

    All reported cases are from two districts (Kampala and Wakiso). 

    Five healthcare workers are among the confirmed cases, indicating transmission in healthcare settings. 

    To date, all cases in Uganda have been linked to importation from the Democratic Republic of the Congo or secondary cases linked to these; there has been no documented community transmission in Uganda.   

    In light of the continued evolution of the outbreak and newly available information, including the increase in the number of reported cases, geographic expansion, cross-border transmission to Uganda, and ongoing response activities, this RRA has been updated. 

    Based on these developments and the WHO Temporary Recommendations issued by the WHO Director-General following the declaration of a Public Health Event of International Concern (PHEIC) for the Ebola disease epidemic caused by Bundibugyo virus (BDBV) in the Democratic Republic of the Congo and Uganda, the risk for countries sharing land borders with countries with documented BDBV detection, currently the Democratic Republic of the Congo and Uganda, has been separated out from the risk for other countries in the African Region: the risk in countries sharing land borders remains high, while the risk for other countries in the African region is assessed as low. 

    Countries sharing land borders with the Democratic Republic of the Congo and/or Uganda have not reported confirmed cases to date. 

    Neighbouring countries have strengthened surveillance and point-of-entry (PoE) measures, although the extent of implementation may vary across countries.  

    The risk globally remains unchanged and is assessed as low.  

    The risk in the Democratic Republic of the Congo remains assessed as very high due to ongoing transmission and the continued expansion of the outbreak into new health zones, increasing the potential for further national and regional spread. 

    The key factors underpinning this assessment include:  

        • The outbreak has continued to expand rapidly since the previous assessment. Between 22 May and 6 June 2026, the number of confirmed cases increased more than eightfold from 63 to 515 cases, while the number of health zones with confirmed cases has increased by 56 % (from 16 to 25), indicating intensified transmission and geographic spread. 

        • The detection of cases in additional health zones in Ituri and North Kivu provinces and ongoing transmission among healthcare workers suggest that the outbreak continues to pose a very high risk of further spread within the Democratic Republic of the Congo. 

        • In Ituri province, 17 of the 36 health zones are now affected, with Aungba, Damas, Gety, Komanda, Lita, Mambasa and Mangala among the newly affected health zones. In North Kivu province, confirmed case detections in the Beni and Kyondo health zones have increased the number of affected health zones to seven out of 35. 

        • According to the most up-to-date sub-national risk stratification analysis, which will be used to further inform operational response priorities, there are a total of 159 health zones currently deemed affected or at risk; this classifies the level of community transmission and underscores the large geographic scale of response needed to control this outbreak.  

            o 25 health zones with confirmed cases, including 17 ‘hotspot’ health zones and eight  ‘active’ health zones{2} 

            o 19 high-risk health zones 

            o 115 at-risk health zones 

        • Epidemiological links and the full chain of transmission are not yet clearly established, and the source of the outbreak remains under investigation.  

        • Retrospective investigations identified suspected viral haemorrhagic fever cases occurring back in March 2026,  several weeks before outbreak confirmation, suggesting prolonged undetected transmission prior to May 2026 and the establishment of multiple disconnected transmission chains across affected communities and provinces. 

        • The affected area is characterized by intense population mobility linked to mining activities, trade, social ties and care seeking, with movement between rural and urban centres and across neighbouring provinces.  

        • Reports of patients avoiding or leaving treatment facilities, together with evidence of ongoing community mistrust of BVD prevention and response measures, raise concerns about reduced healthcare-seeking behaviour and under-detection of cases. As observed during previous Ebola disease outbreaks, community  fear and misinformation have hindered case detection, contact tracing, and isolation efforts, contributing to sustained transmission. Such challenges may facilitate ongoing spread within affected communities and complicate outbreak control measures. 

        • Reports of numerous community deaths and challenges in the implementation and community acceptance of safe and dignified burial (SDB) practices are of concern. Traditional burial practices often involve direct contact with the deceased, which may facilitate transmission and contribute to the persistence of community-based transmission chains. 

        • Ongoing conflict in Ituri and North Kivu provinces restricts the movement of surveillance teams, limits the deployment of Rapid Response Teams, and hinders the secure transport of laboratory samples, as well as posing challenges to contact tracing, safe and dignified burials and control of movement of high-risk contacts in those conflict zones. 

        • Limited healthcare infrastructure, combined with inadequate and insufficient Ebola Treatment Centre (ETC) and isolation capacity, may hinder effective case management and infection prevention and control measures. The mixing of suspected and confirmed cases in healthcare facilities increases the risk of nosocomial transmission and may further amplify the outbreak. 

        • Delays in laboratory confirmation resulting from stockouts of testing supplies and limited diagnostic capacity have hindered the timely detection, isolation, and management of cases. 

        • Infection among at least 16 healthcare workers, including a laboratory technician, together with low infection prevention and control (IPC) scorecard performance in affected areas, indicate a high risk of exposure in healthcare settings and significant gaps in IPC. 

        • Early and intensive  supportive care remains the only treatment option for BVD, for which no licensed vaccine or specific therapeutics are currently available for prevention and treatment.  

        • Community protection capacities remain insufficient in several affected areas, including limited social listening, community feedback mechanisms, rumour management, engagement of trusted local leaders and Community Health Workers (CHWs), and systematic use of community insights to inform operational decision-making. These gaps may contribute to delayed care-seeking, underreporting, reduced acceptance of response measures and continued transmission. 

    The level of risk for Uganda is still assessed as High due to: 

        • Confirmed cross-border spread through imported cases to Uganda. 

        • As of 6 June 2026, Uganda had reported 19 cases linked to the outbreak in the Democratic Republic of the Congo, following the importation of two cases who travelled to Uganda to seek medical care. Among the reported cases, five are healthcare workers, indicating transmission in healthcare settings. 

        • Despite the suspension of passenger transport services between Uganda and the Democratic Republic of the Congo, including flights, buses, and ferries, cross-border population movement is likely to continue through informal and uncontrolled crossing points. The porous border, together with intense cross-border mobility associated with mining, trade, family visits, healthcare-seeking, displacement or population movements linked to insecurity, increases the likelihood of continued cross-border transmission. 

        • Potential for undetected chains of transmission in border communities. 

        • Preliminary analyses of population movement and cross-border mobility patterns have identified Kisoro, Kabale, Kanungu, Rukungiri, Kasese, Kikuube, Hoima, Pakwach, Nebbi, Arua, Zombo, Koboko, and Yumbe as the districts at increased risk of importation and subsequent transmission of BVD from the Democratic Republic of Congo. 

        • Ongoing epidemiological links along the eastern Democratic Republic of the Congo–western Uganda corridor, historically affected by Ebola outbreaks, including Bundibugyo and Sudan virus disease outbreaks. 

    The risk for countries with land borders adjoining countries with documented BDBV detection, is assessed as high  based on the following factors: 

        • Sustained population mobility across porous borders linked to cross-border trade and mining activities, combined with operational constraints resulting from insecurity, displacement, and limited healthcare access, increase the risk of continued transmission and hinder outbreak control measures. 

        • Insufficient laboratory capacity, coupled with limited experience in BVD surveillance, case management, infection prevention and control, contact tracing, and outbreak response, may reduce the ability of some neighbouring countries to rapidly detect and contain imported cases. 

        • Variable levels of readiness for community engagement, community-based surveillance, social listening, rumor management and community feedback systems may limit the ability of some neighbouring countries to rapidly identify, understand and respond to community concerns following an imported case. 

        • There are variations in capacities and experiences across these countries.  

    The level of risk for the rest of the Africa region and at the global level is assessed as low due to: 

        • At present the outbreak remains geographically limited to the Democratic Republic of the Congo, with exportation of cases only to Uganda. 

        • No evidence suggests sustained international transmission of BVD beyond the Democratic Republic of the Congo and Uganda border areas currently. 

        • The exportation of cases through international travel, particularly during the asymptomatic incubation period, is possible and may be anticipated; however, this does not change the overall risk assessment, and the risk of global spread remains low. 

(...)

1 Confidence refers to the level of confidence in the data/information or the quality of the evidence available at the time the RRA is conducted. Poor quality information may increase the overall perceived risk due to the incertitude in the assessment. 

2 ‘Hotspot’ health zones refer to those with the highest burden of active transmission among those with confirmed cases reported; ‘active’ refers to all other health zones with confirmed cases reported 

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Source: 

Link: https://www.who.int/publications/m/item/who-rapid-risk-assessment-ebola-disease-caused-by-bundibugyo-virus--democratic-republic-of-the-congo--uganda-and-countries-with-land-borders-adjoining-countries-with-documented-bdbv-detection-v3

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Avian #Influenza #Report - May 31 – June 6 '26 (Wk 23) (#HK CHP, June 9 '26): 2 new human #H5N1 virus cases in #Bangladesh, #India; 1 new case of H9N2 virus in #China

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    -- Bangladesh

        ° Avian influenza A(H5N1) 

            ° Sylhet Division: 

                - The case involved a child with symptom onset on March 27, 2026.  

                - The patient was admitted to a hospital on March 28 for treatment of measles with bronchopneumonia, and was discharged on March 30. 

                - Epidemiological investigations revealed the case had exposure to household poultry.   

                - No additional cases were reported among the identified contacts.  

    -- India

        ° Avian influenza A(H5N1)

            - The case involved a child who developed symptoms and was admitted to a hospital on March 19, 2026. 

            - The patient was discharged on March 23.  

            - Epidemiological investigations revealed the case likely had indirect exposure to poultry. 

            - No additional cases were reported among the identified contacts. 

        -- China

            ° Avian influenza A(H9N2): 

                ° Yunnan Province: 

                    - A 4-year-old boy with onset on May 17, 2026. 

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Link: https://www.chp.gov.hk/files/pdf/2026_avian_influenza_report_vol22_wk23.pdf

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#Taiwan reported a rise in domestic #COVID19 cases, public is invited to wear masks as needed (CDC, June 9 '26)

 

    The Taiwan Centers for Disease Control (CDC) stated today (June 9th) that, according to monitoring data, the domestic COVID-19 epidemic has been rising from its low point. 

    In the 22nd week (May 31st - June 6th), there were 1,000 outpatient and emergency room visits related to COVID-19, a 4.1% increase compared to the previous week. 

    Last week (June 2nd - June 8th), there were 5 new local cases of severe COVID-19 complications, with no new local deaths. 

    Since October 2025, there have been a cumulative total of 90 local cases of severe COVID-19 complications, of which 14 have died. 

    The majority of severe cases are among those aged 65 and above (72.2%) and those with a history of chronic diseases (81.1%), and 93.3% have not received the COVID-19 vaccine this season.

    The Centers for Disease Control (CDC) pointed out that the global COVID-19 positivity rate has recently risen slightly from its low point. 

    The predominant circulating variants are BA.3.2 and XFG, followed by NB.1.8.1. 

    Among all regions, Southeast Asia has seen a significant increase. 

    The epidemic in neighboring countries is rising in India, the epidemic in Singapore is fluctuating from its peak, the epidemic in China is rising slightly from its low point, and the epidemic in Japan is flat from its low point.

    The Taiwan Centers for Disease Control (CDC) reminds the public that with the rise of COVID-19 cases in Taiwan, it urges the public to strengthen their self-protection awareness, practice hand hygiene and respiratory etiquette. 

    To protect their own health and the health of others, if they experience respiratory symptoms such as fever, cough, runny nose, or sore throat, or when visiting healthcare facilities, in crowded places where social distancing is difficult or poorly ventilated, or in close contact with the elderly or immunocompromised individuals, it is recommended to wear a mask. 

    If you have a fever or respiratory symptoms, it is advised to stay home and avoid unnecessary outings. 

    Those with severe risk factors and who meet the criteria for publicly funded antiviral medication should seek medical attention as soon as possible if they experience suspected symptoms. 

    A doctor will assess the symptoms and prescribe antiviral medication to reduce the risk of serious complications or death after infection. 

    Furthermore, the CDC urges those who have not yet received this season's COVID-19 vaccine within the past six months to get vaccinated as soon as possible.

    The Centers for Disease Control (CDC) emphasizes that there are currently sufficient reserves of COVID-19 vaccines and antiviral drugs. 

    For inquiries about vaccination sites, contracted hospitals for publicly funded oral antiviral drugs, and the latest epidemic prevention policies, the public can visit the CDC website (https://www.cdc.gov.tw) or call the toll-free epidemic prevention hotline 1922 (or 0800-001922).

Source: 

Link: https://www.cdc.gov.tw/Bulletin/Detail/gyc9j6zazoe_7nR9FqdFYQ?typeid=9

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#Ebola disease caused by #Bundibugyo virus, #DRC & #Uganda (#WHO D.O.B., June 8 '26): 515 confirmed cases and 95 deaths in DRC

 

Situation at a glance

    The Bundibugyo virus disease (BVD) outbreak in the Democratic Republic of the Congo continues to evolve rapidly, with increasing case numbers, geographic spread, and cross-border transmission to Uganda. 

    As of 6 June, a total of 515 confirmed cases, with 91 deaths among these confirmed cases, have been reported from the Democratic Republic of the Congo; Uganda has reported 19 confirmed cases including two deaths, as well as one probable case who has died. 

    In Uganda, the outbreak remains epidemiologically linked to transmission originating in the Democratic Republic of the Congo, with evidence of both imported infections and secondary transmission among contacts and healthcare workers. 

    National authorities, in collaboration with WHO and partners, are undertaking a wide-ranging package of response measures. 

    On 5 June, the Africa Centres for Disease Control and Prevention (Africa CDC) and WHO, together with partners, launched a joint Ebola continental preparedness and response plan, with an ask of US$ 518 million to support African countries to prepare for, rapidly detect and respond to the outbreak.

Description of the situation

    Since the last Disease Outbreak News was published on 29 May 2026, the number of confirmed cases and deaths have increased rapidly in the Democratic Republic of the Congo and Uganda. 

    In total, 534 confirmed cases including 93 deaths (case fatality rate [CFR] 17.4%) have been reported from both countries, while at least 17 people have recovered from the disease.

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Democratic Republic of the Congo

    Since 29 May, an additional 390 confirmed cases including 74 confirmed deaths have been reported from the Democratic Republic of the Congo. 

    The increase is in part due to the scale up of testing and diagnostic capacities, enabling testing of the backlog of previously collected samples. 

    As of 6 June 2026, a total of 515 confirmed cases including 91 deaths (CFR 17.7%) have been reported from the Democratic Republic of Congo. 

    The reported CFR is likely an underestimation as many deaths that occurred before the outbreak declaration remain under investigation. 

    So far, 12 patients have recovered. 

    Cases have been reported from 25 health zones (HZ) from Ituri (17/36 HZ), North Kivu (7/35 HZ) and South Kivu Provinces (1/34 HZ)[1]. 

    Sixteen confirmed cases have been reported among health and care workers to date.

    The outbreak remains concentrated in Ituri Province, which accounts for 94% (487) of confirmed cases. 

    The CFR in Ituri is 15% (74/487); significantly lower than the CFR in North Kivu which is 64% (16/25). 

    The highest confirmed case numbers in Ituri Province are reported from Bunia (142 cases), Rwampara (98 cases), Mongbwalu (92 cases), and Nyankunde (24 cases) HZ.

    As of 6 June, 5040 contacts had been identified and were under follow-up across Ituri (4118), North Kivu (699), and South Kivu (223) provinces. 

    Of these, 2535 contacts were followed up in the last 24 hours, corresponding to follow-up rates of 43.2% in Ituri, 82.5% in North Kivu, and 80.3% in South Kivu.

    Increasing security-related incidents affecting health facilities have posed additional operational challenges in affected provinces. These conditions are constraining access for the response, disrupting surveillance and response activities, and increasing the risk of undetected transmission. Such incidents underline the challenges of the context and the importance of working closely with local leaders and communities. 

Figure 2: Number of confirmed cases (n = 515), including deaths,  in the Democratic Republic of the Congo, by date of reporting and as of 6 June 2026

{Click on Image to Enlarge}

NB: Newly reported confirmed cases/deaths may be part of the back log of samples and therefore not necessarily newly acquired infections. 

Uganda

    Since the last update dated 29 May, an additional 10 confirmed cases and one death have been reported from Uganda. 

    As of 6 June 2026, a total of 19 confirmed cases including two deaths in imported cases, and one probable case who has died, have been reported. 

    Five recoveries have been reported. 

    Of the total cases, 14 cases are imported and five are Ugandans. 

    The cases were reported from two districts Kampala and Wakiso. 

    To date, all cases in Uganda can be linked to travelers from the Democratic Republic of the Congo, or secondary infections linked to them; there has been no documented community transmission in Uganda. 

    Exposure risks are associated with healthcare settings and cross-border movements.

    About 70% of the cases are Congolese nationals who came to Uganda to seek medical care. 

    This includes a Congolese national who travelled from the Democratic Republic of the Congo, via Uganda, to the United Arab Emirates and then back to Uganda. 

    WHO is working with public health authorities in the United Arab Emirates and Uganda to gather additional information to assess the risk of exposure and facilitate contact tracing through the National International Health Regulations (IHR) Focal Point mechanism. 

    Based on the information available to date, there is no evidence that the case exhibited clearly recognized symptoms consistent with BVD during travel to or from the United Arab Emirates. 

    Following notification of the case, UAE authorities rapidly implemented risk assessment, contact tracing activities, follow-up of identified contacts, public health investigations, enhanced preparedness measures at points of entry, and coordination with relevant national and international partners. 

    Epidemiological investigations to date have not identified any secondary cases, local transmission, or evidence of onward spread in the. The findings support the conclusion that the risk of transmission associated with this event in the United Arab Emirates was very low.

    As of 2 June, a total of 668 contacts linked to the cases have been identified and are under follow-up. These include close residential contacts and hospital contacts where the cases were hospitalized. 

Figure 3: Number of confirmed cases (n = 19), including deaths, in Uganda by date of reporting and as of 6 June 2026  Number of confirmed cases and deaths in Uganda

{Click on Image to Enlarge}

Epidemiology

    Bundibugyo virus disease (BVD) is a severe and often fatal form of Ebola disease caused by the Bundibugyo virus, one of the Orthoebolavirus species. 

    It is a zoonotic disease, with fruit bats suspected to be the natural reservoir. 

    Human infection is thought to occur through close contact with the blood or secretions of infected wildlife, such as bats or non-human primates, and it subsequently spreads from person to person through direct contact with the blood, secretions, organs, or other bodily fluids of infected individuals or contaminated surfaces or items. 

    Transmission is particularly amplified in health-care settings when infection prevention and control (IPC) measures are inadequate, and during unsafe burial practices involving direct contact with the deceased.

    The incubation period for BVD ranges from two to 21 days, and individuals are not infectious until symptom onset. 

    Early symptoms such as fever, fatigue, muscle pain, headache, and sore throat, are non-specific, which complicates clinical diagnosis and can delay detection. 

    These symptoms then progress to gastrointestinal symptoms, organ dysfunction, and in some cases haemorrhagic manifestations. 

    Case fatality rates in the past two BVD outbreaks, reported in Uganda and in the Democratic Republic of the Congo in 2007 and 2012 were 30% and 50% respectively.

    Differentiating BVD from other endemic febrile illnesses such as malaria is challenging without laboratory confirmation using PCR or antigen/antibody-based assays. 

    Control relies on rapid case identification, isolation and care, contact tracing, safe burials, and strong community engagement, as no approved vaccines or specific treatments currently exist for BVD.

Public health response

    Health authorities in the Democratic Republic of the Congo and Uganda, in collaboration with WHO and partners, are implementing comprehensive public health measures including implementing the continental response plan, engaging donors and mobilizing additional resources to address critical funding gaps and sustain response operations across affected and at-risk areas.

    Key response activities also include interagency coordination and deployment of field teams, delivery of medical supplies, strengthening surveillance, increasing laboratory capacity, infection prevention and control, the set-up of safe and optimized treatment centers, risk communication and community engagement, and research on potential medical countermeasures.

    For further information about public health response actions by the respective Ministry of Health, WHO, and partners, please refer to the latest situation reports published by the WHO Regional Office for Africa:  Ebola Bundibugyo Virus Disease Outbreak Democratic Republic of the Congo | Uganda Weekly External Situation Report 03, Data as of 31 May 2026 | WHO | Regional Office for Africa

WHO risk assessment

    On 6 June 2026, WHO reassessed the risk of the outbreak of BVD to incorporate newly available information and the WHO Temporary Recommendations. 

    The risk for countries sharing land borders with countries with documented Bundibugyo virus (BVDV) detection, as of this report Democratic Republic of the Congo and Uganda, has been separated out from the risk for other countries in the African Region.

    The risk in the Democratic Republic of the Congo remains assessed as very high due to ongoing transmission and the continued expansion of the outbreak into new health zones, increasing the potential for further national and regional spread.

    The risk in Uganda is still assessed as high due to confirmed cross-border spread through imported cases and ongoing epidemiological links along the eastern Democratic Republic of the Congo–western Uganda corridor, historically affected by Ebola outbreaks, including Bundibugyo and Sudan virus disease outbreaks.

    The risk for countries with land borders adjoining countries with documented BDBV detection, is assessed as high due to sustained population mobility linked to cross-border trade and mining activities, variation in capacities and experience of BVD response and variable levels of readiness.

    The risk for the rest of the Africa region and at the global level is assessed as low.

WHO advice

    WHO advises against any restriction of travel to, or trade with, the Democratic Republic of the Congo or Uganda based on the currently available information. WHO continues to closely monitor and, where necessary, verify travel and trade measures in relation to this event.

    For further information on the considerations for implementing border health and international travel-related temporary recommendations, please see the relevant technical note issued on 26 May 2026

    The temporary recommendations issued to State Parties on 22 May 2026 underscore the importance of coordinated outbreak control, enhanced cross‑border collaboration, and sustained surveillance and preparedness to prevent further regional spread and ensure an effective public health response.

    WHO has convened several technical advisory groups, including the Strategic Advisory group of Experts (SAGE) to assess candidate vaccines and therapeutics for BVD. Key recommendations made are available in the news release published on 28 May 2026.

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Source: 

Link: https://www.who.int/emergencies/disease-outbreak-news/item/2026-DON606

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