H5 bird flu is causing outbreaks in wild birds and poultry, other animals and sporadic human cases.
A multi-state outbreak of HPAI A(H5N1) bird flu in dairy cows was first reported on March 25, 2024.
Infections with highly pathogenic avian influenza A(H5N1) viruses in mammals have been reported.
January 14, 2024, USDA APHIS reported the first H5N1 detection in wild birds in the US since 2016.
In February 2022, USDA’s APHIS announced an HPAI A(H5N1) virus outbreak in commercial poultry.
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CDC surveillance shows no indicators of unusual flu activity in people, including H5N1 bird flu.
Read the latest H5N1 technical report for information on H5N1 outbreaks globally.
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