Federal health officials are warning that certain lots of raw cat food may be contaminated with H5N1 bird flu after a pet cat in San Francisco that ate the food became infected with the virus and had ...

Proteins and genetic material from H5N1 influenza viruses have been found in pasteurized milk in the United States, but a study from St. Jude Children's Research Hospital shows those inactive viral ...

Highly pathogenic avian influenza A(H5N1) viruses have been circulating among wild birds and are enzootic in poultry in some areas of the world with spillover to a wide range of terrestrial and marine ...

Four years ago, as attention locked onto COVID-19, another virus began circling the globe. A major outbreak of a new strain of bird flu—formally named influenza A virus subtype H5N1—has since killed ...