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

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

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 ...

Health officials urge vigilance against bird flu, but some experts are puzzled as to why reports of new human cases have ...

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