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

Are immigrant farm workers, who have accounted for many of the U.S. cases, more afraid to come forward for testing amid ...

The most recent infections confirmed by the Centers for Disease Control and Prevention were in early February.

The puzzling halt in reported human bird flu cases has prompted health officials to renew calls for vigilance, even as ...

The most recent infections confirmed by the Centers for Disease Control and Prevention were in early February in Nevada ... one CDC official noted that there is a seasonality to bird flu: Cases ...

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