Many medical organizations and frontline health care providers are grappling with a challenge they haven't had to face in many years: how to protect newborns against hepatitis B.Last week, a federal ...

When people hear the phrase herd immunity, many think immediately of COVID-19. During the pandemic, we learned—sometimes painfully—that individual health decisions can shape collective outcomes.

Add Yahoo as a preferred source to see more of our stories on Google. U.S. Secretary of Health and Human Services Robert F. Kennedy Jr., right, speaks while standing next to President Trump during an ...

The U.S. officially eliminated measles in 2000 but is at risk of losing its status after substantial outbreaks last year and so far this year.