The Department of Health and Human Services says it will require new vaccines to be tested against a placebo, which could ...

Three new health reports detail growing concern about an animal sedative that’s showing up in the nation's illegal drug ...

With one-fifth of states seeing active measles outbreaks, the U.S. is nearing 900 cases, according to the U.S. Centers for Disease Control and Prevention.

As the virus takes hold in other U.S. communities with low vaccination rates, health experts fear that the spread could ...