Health officials are making a renewed call for vigilance against bird flu, but some experts are puzzling over why reports of ...

During a call with U.S. doctors this month, one CDC official noted that there is a seasonality to bird flu: Cases peak in the fall and early winter, possibly due to the migration patterns of wild ...

Health officials are making a renewed call for vigilance against bird flu, but some experts are puzzling over why reports of ...

During a call with U.S. doctors this month, one CDC official noted that there is a seasonality to bird flu: Cases peak in the fall and early winter, possibly due to the migration patterns of wild ...

Health officials urge caution about bird flu. Experts are unsure why human cases stopped. H5N1 spread among birds, cows, and ...