ETIDIOH - NEW

  {Excerpt} Time Period: March 08, 2026 - March 14, 2026 -- H5 Detection :  8 site(s) ( 1.8% ) -- No Detection :  444 site(s) ( 98.2% ) -- No samples in last week :  120 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  Summary -- What is already known about this topic? - CDC tracks SARS-CoV-2 variants internationally using digital public health surveillance and in the United States using genomic surveillance, including wastewater and traveler-based surveillance.  - The highly divergent SARS-CoV-2 variant BA.3.2 was first detected in a respiratory sample collected on November 22, 2024, in South Africa. -- What is added by this report? - As of February 11, 2026, BA.3.2 had been reported in 23 countries.  - Detections began increasing in September 2025.  - In the United States , BA.3.2 was detected in nasal swabs from four travelers, three airplane wastewater samples, clinical samples from five patients, and 132 wastewater samples from 25 U.S. states. -- What are the implications for public health practice? - Monitoring the spread of BA.3.2 provides valuable information about the potential for this new SARS-CoV-2 lineage to evade immunity from a previous infection or vaccination. Ab...

{Excerpt} Time Period: March 01, 2026 - March 07, 2026 -- H5 Detection :  8 site(s) ( 1.6% ) -- No Detection :  491 site(s) ( 98.4% ) -- No samples in last week :  77 site(s) (...) Source: US Centers for Disease Control and Prevention,  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  Abstract In the United States, annual influenza vaccination has been recommended for all persons aged ≥6 months , including during the 2025–26 season. Interim influenza vaccine effectiveness (VE) estimates were calculated for patients with acute respiratory illness–associated outpatient visits and hospitalizations from three U.S. respiratory virus VE networks during the 2025–26 influenza season, using a test-negative case-control design . Among children and adolescents aged <18 years, VE was 38%–41% against influenza outpatient visits and 41% against influenza-associated hospitalization . Among adults aged ≥18 years, VE was 22%–34% against influenza outpatient visits and 30% against influenza-associated hospitalization . Among children and adolescents , VE against influenza A ranged from 37% (against outpatient visits) to 42% (against hospitalization) across settings; among adults , VE against influenza A ranged from 30% (against hospitalization) to 34% (against outpatient vis...

  {Excerpt} Time Period: February 22, 2026 - February 28, 2026 -- H5 Detection :  9 site(s) ( 2.0% ) -- No Detection :  443 site(s) ( 98.0% ) -- No samples in last week :  147 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: February 15, 2026 - February 21, 2026 -- H5 Detection :  4 site(s) ( 0.8% ) -- No Detection :  495 site(s) ( 99.2% ) -- No samples in last week :  110 site(s) (...) Source: US CDC,  https://www.cdc.gov/ Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: February 08, 2026 - February 14, 2026 -- H5 Detection :  9 site(s) ( 1.9% ) -- No Detection :  466 site(s) ( 98.1% ) -- No samples in last week :  171 site(s) The H5 detections at sewershed IDs 809 and 912 in Michigan are false detections resulting from a data error. These will be corrected in the next update. (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: February 01, 2026 - February 07, 2026 -- H5 Detection :  8 site(s) (1.7%) -- No Detection :  475 site(s) (98.3%) -- No samples in last week :  166 site(s) The H5 detections at sewershed IDs 809 and 912 in Michigan are false detections resulting from a data error. These will be corrected in the next update . (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: January 25, 2026 - January 31, 2026 -- H5 Detection :  4 site(s) ( 0.9% ) -- No Detection :  458 site(s) ( 99.1% ) -- No samples in last week :  192 site(s) The H5 detections at sewershed IDs 809 and 912 in Michigan are false detections resulting from a data error. These will be corrected in the next update. (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  Abstract US retail milk monitoring during April 13–May 3, 2024 , identified influenza A(H5N1) viral RNA in 36% of retail milk samples , indicating widespread undetected infections in US dairy cows . After federal initiatives, reported infections more closely aligned with findings in retail milk during December 27, 2024–January 29, 2025 , reflecting improved detection and control. Source:  Link:  https://wwwnc.cdc.gov/eid/article/32/2/25-1332_article ____

  {Excerpt} Time Period: January 18, 2026 - January 24, 2026 -- H5 Detection :  4 site(s) ( 0.9% ) -- No Detection :  437 site(s) ( 99.1% ) -- No samples in last week:  204 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: January 11, 2026 - January 17, 2026 -- H5 Detection :  6 site(s) ( 1.1% ) -- No Detection :  519 site(s) ( 98.9% ) -- No samples in last week:  78 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: January 04, 2026 - January 10, 2026 -- H5 Detection :  8 site(s) ( 1.5% ) -- No Detection :  541 site(s) ( 98.5% ) -- No samples in last week :  66 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: December 28, 2025 - January 03, 2026 -- H5 Detection :  3 site(s) ( 0.7% ) -- No Detection :  428 site(s) ( 99.3% ) -- No samples in last week :  111 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: December 21, 2025 - December 27, 2025 -- H5 Detection :  4 site(s) ( 1.1% ) -- No Detection :  359 site(s) (98.9%) -- No samples in last week :  168 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: December 14, 2025 - December 20, 2025 -- H5 Detection :  1 site(s) ( 0.2% ) -- No Detection :  461 site(s) ( 99.8% ) -- No samples in last week :  57 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: December 07, 2025 - December 13, 2025 {*} -- H5 Detection :   3 site(s) ( 0.7% ) -- No Detection :  451 site(s) ( 99.3% ) -- No samples in last week :  37 site(s) {*} Note: The H5 detection at site 2030 in Virginia is a result of a data error and is a false detection. This will be corrected in the next update. (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Excerpt} Time Period: November 30, 2025 - December 06, 2025 -- H5 Detection :  2 site(s) ( 0.5% ) -- No Detection :  390 site(s) ( 99.5% ) -- No samples in last week :  54 site(s) (...) Source:  Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____

  {Summary} Time Period: November 23, 2025 - November 29, 2025 -- H5 Detection :  2 site(s) ( 0.6% ) -- No Detection :  352 site(s) ( 99.4% ) -- No samples in last week :  102 site(s) (...) Source:   Link:  https://www.cdc.gov/nwss/rv/wwd-h5.html ____