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Technical Report : Highly Pathogenic Avian Influenza A(H5N1) Viruses
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April 26, 2024
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Description:Updated April 26, 2024
This report provides an update to the December 29, 2023, report to include seven new human cases (5 in Cambodia, 1 in the United States and 1 in Vietnam) and recent activity in wild birds, poultry and other animals, including the multi-state veterinary outbreak in U.S. dairy cattle, and updated information on monitoring for H5N1 virus infections in the United States. Even given these updates, CDC believes the overall risk to human health associated with the ongoing outbreaks of highly pathogenic avian influenza A(H5N1) viruses has not changed and remains low to the U.S. general public at this time.
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Content Notes:HPAI A(H5N1) viruses in wild birds and poultry -- HPAI A(H5N1) virus infections among mammals -- Human cases of A(H5N1) -- Table 1. Global reported A(H5N1) human cases, January 2022 through April 25, 2024 -- Figure 1. Epidemic Curve of Human Cases of A(H5N1) by Illness Onset Date, 1997-2024 by Country (N=909) -- Monitoring of persons exposed to HPAI A(H5N1) viruses in the United States -- U.S. influenza surveillance for human infections with novel influenza A viruses, including HPAI A(H5N1) virus -- CDC and U.S. Government Preparedness Activities -- Limitations of the Report -- Conclusions -- References -- Resources .
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