Mutations can result in viruses that infect cells, but can't copy themselves without help from other viruses - now it seems ...

As it does with other pathogens, your immune system sees drugs as foreign invaders to be expelled from your body. But ...

Outbreaks of dengue are killing thousands of people in South America each year and getting worse. Brazil hopes to turn the ...

Health Secretary Robert F. Kennedy Jr.'s new vaccine advisory committee meets this week, with votes expected on whether to ...

He's just the latest Republican politician to use Kirk's murder as a pretext for eradicating trans people from public life.

Medical experts say vaccination is the best prevention method for hepatitis B, a liver infection that can be acute or chronic. The disease has no cure and can cause a variety of complications.

Until now, the vaccinations had been routinely provided to nearly all Americans who wanted them. The Food and Drug ...

CDC staff presented data showing that hospitalization rates for Covid are highest for adults 75 and older, followed by babies under 6 months — who cannot be vaccinated and rely on maternal antibodies ...

Water treatment workers are grappling with how to protect against a new threat: hackers burrowing into the system and ...

U.S. Health Secretary Robert F. Kennedy Jr.’s vaccine advisory committee is recommending new restrictions on the MMRV vaccine.

A virus found lurking inside a deadly fungus may make the microbe even stronger and harder to kill when it infects people.