How do vaccines work? Here's what medical experts want you to know about safety and efficacy.

Scientists are making rapid progress toward a long-awaited goal that could help to reshape cancer care: mRNA cancer vaccines ...

Vaccines boost the immune system's ability to fight off diseases. Vaccines undergo rigorous testing to ensure safety and effectiveness. Widespread vaccination contributes to herd immunity, protecting ...

In a post on Truth Social, the president suggested that the C.D.C. was being “ripped apart” over a question that was answered long ago. By Apoorva Mandavilli and Carl Zimmer In a message on social ...

Many kids are scared of getting needles, and this can stop them getting vaccinations that protect that against the flu. Less ...