The virus has not yet evolved to spread efficiently between people. Excellent vaccine technology exists, but the government ...

Bird flu continues to spread quickly through the U.S. farm system because that system is inherently a viral playground.

Amid promising signs, officials urged caution, noting that the outbreaks vary by clade, response measures, and social ...

During his Senate confirmation hearings, Health Secretary Robert F. Kennedy Jr. suggested he wouldn’t undermine vaccines.