The progression of the species-jumping disease has been unprecedented, including the first-ever U.S. cases of infections in ...

In April, the tally of affected birds in New York was about 25,000. The bird flu outbreak raised alarms in late ...

The current bird flu outbreak in Massachusetts is the largest the state has ever seen. Here's why officials believe it has ...

As the disease rapidly evolves, questions continue to rise: what is the bird flu? Why is this different? What can we do?

While the H5N1 bird flu keep spreading, the first reported H5N9 outbreak in the United States has been identified on a duck ...

More Oklahoma school districts are closing their doors Friday in an attempt to stop the spread of the flu. Oklahoma City ...