This week, mRNA vaccines are set to face intense scrutiny from critics in Congress. Here's an explainer of how we know they are safe and effective.

The FDA is requiring COVID vaccine makers Pfizer and Moderna to update their warnings about the possible risk of myocarditis and pericarditis.

There is no association between COVID-19 vaccination in pregnancy and spontaneous abortion, according to study findings.

Late-stage trial data suggest that a new COVID-flu vaccine offers good protection against both infections, but experts expect ...

A study has uncovered a surprising link between vaccination and menstrual changes.

There is no link between the COVID-19 vaccine and miscarriage, a latest studyfinds.While the virus itself poses significant ...

There also was no link between miscarriage risk and the number of vaccinations a woman had gotten, or whether she’d gotten ...