H7N9 — is detected in at a poultry farm; scientists learn that past human flu exposure may provide some immunity to H5N1.

Exposure to human seasonal flu may confer some immunity to H5N1 bird flu. The new strain found in Noxubee County, Miss., was confirmed March 12 and all of the roughly 46,000 birds either died or ...

Healthcare workers who developed COVID-19 and had at least one underlying medical condition missed more days of work than those who had the flu, or a SARS-CoV-2 infection without symptoms, according ...