The Latest Breaking News from William Schaffner

Florida’s top health official sent a letter this week to the heads of the Food and Drug Administration and the Centers for Disease Control and Prevention warning that mRNA COVID-19 vaccines could be dangerous.

The risk to the U.S. is low, experts say. But "what happens in Africa can show up in your backyard hospital in less than 24 hours,” Dr. Luis Ostrosky, an infectious diseases specialist at The University of Texas Health Science Center at Houston, tells Fortune.

It is rising fast as a contender amid dramatic outbreaks among mammals, and could be far deadlier than COVID-19.

Norovirus is also nicknamed “the cruise ship virus,” as it easily spreads among people in close quarters.

NPR asked COVID-19 experts how we should keep weighing risk as we enter the fourth year of the pandemic.

The illness sends tens of thousands of babies to the hospital each year. If approved, the new injection would be the first broadly available prevention tool.

Can the cordyceps fungus really infect humans and cause a global pandemic? Experts weigh in on 'The Last of Us.'

XBB.1.5 is the most highly transmissible version we've seen of the Covid-19 virus. It's also very good at evading immune defenses.

Mpox is no longer the exploding health crisis that it appeared to be less than six months ago

There are ways to treat the infection and protect yourself and your family from getting it in the first place. Here’s what you need to know.

More than a month after China started seeing an exponential surge in COVID cases, the country has only reported two virus deaths, defying the experience of other, more vaccinated and better resourced places as they reopened and fueling suspicion the true scale of fatalities is being hidden.