Human Avian Influenza Cases in Washington State Residents{*}
[Exposure - Probable - Confirmed - Total human cases (H5)]
-- Poultry - 3 - 11 - 14
-- Unknown- 1{^} - 0 - 1
-- Total - 15
{*} Washington residency could not be confirmed for one case with exposure to poultry in Washington.
{^} Currently under investigation; case classification and source of infection may be updated.
Note: Updates to national public health reporting and notification of novel influenza A infections were approved by the Council of State and Territorial Epidemiologists (CSTE) in June 2024 and enacted in September 2024. Whether a case is counted as confirmed or probable is determined after completion of a public health case investigation and takes into account a person's exposure to avian influenza virus, whether confirmatory testing at the CDC was negative or positive, and whether a person experienced symptoms of illness. The specific criteria used to determine if a case is confirmed, or probable is based on a standardized case definition for public health surveillance which allows states to apply the same criteria and to count cases in the same manner for national reporting.
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Source: Department of Health, State of Washington, https://doh.wa.gov/you-and-your-family/illness-and-disease-z/avian-influenza
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