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 ...

As more humans become infected by H5N1 bird flu, experts worry of a new pandemic with 70 human cases in the U.S. including 1 death. What to look for.

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

Health officials are making a renewed call for vigilance against bird flu, but some experts are puzzling over why reports of new human cases have stopped. Has the search for cases been weakened by ...

Health officials are urging vigilance as reports of bird flu cases in humans appear to have stopped Health officials are making a renewed call for vigilance against bird flu, but some experts are ...

Health officials are making a renewed call for vigilance against bird flu, but some experts are puzzling over why reports of new human cases have stopped appearing. Has the search for cases been ...

Outbreaks of bird flu in mammals more than doubled across the world last year, raising the risk that the virus could ...