Moderna said it’s requesting a meeting with the U.S. Food and Drug Administration after receiving a “refusal-to-file” letter, which means the FDA isn’t going to review the company’s advanced-stage ...

Find out how different vaccines for the coronavirus cause your body to create antibodies that fight the virus.

Learn about the safety and effectiveness of COVID-19 vaccines for kids, the possible side effects, and the benefits of vaccination.

Stanford scientists have uncovered how mRNA COVID-19 vaccines can very rarely trigger heart inflammation in young men — and how that risk might be reduced. They found that the vaccines can spark a two ...