It's the largest outbreak of human bird flu infections in U.S. history, and accounts for most of the 11 cases reported to date.

COLORADO, USA — U.S. health officials on Friday announced two more bird flu cases among farmworkers, but they also said a new study in Michigan suggested the virus is not causing silent ...

Meanwhile, two more infections tied to a Colorado poultry farm were reported, bringing the total to six. It’s the largest outbreak of human bird flu infections in U.S. history.

Want to know how many human bird flu cases there are in Colorado? Colorado Department of Public Health and Environment has a new tracker.

News Nation/World Two more bird flu cases reported in Colorado, but elsewhere a study finds no asymptomatic infections This 2005 electron microscope image shows an avian influenza A H5N1 virion.

NEW YORK – U.S. health officials on Friday announced two more bird flu cases among farmworkers, but they also said a new study in Michigan suggested the virus is not causing silent infections in ...

NEW YORK (AP) — U.S. health officials on Friday announced two more bird flu cases among farmworkers, but they also said a new study in Michigan suggested the virus is not causing silent ...

NEW YORK (AP) — U.S. health officials on Friday announced two more bird flu cases among farmworkers, but they also said a new study in Michigan suggested the virus is not causing silent ...