A common side effect of COVID-19 vaccination was linked in a new study to an unexpected source.

Share on Pinterest Subtle differences in immune system reactions may explain why some people get more serious side effects ...

The distribution of the first vaccines for the coronavirus has raised hopes that the end of the pandemic may be in sight, but it has also sparked some concern about side effects. Here’s what we know ...

The Pfizer-BioNTech and Moderna COVID-19 vaccines cause heart inflammation, a new report from a National Academies of Sciences, Engineering, and Medicine (NASEM) committee says. But the organization’s ...

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

The US Food and Drug Administration has issued emergency use authorization (EUA) for the Covid-19 vaccine developed by Pfizer and BioNTech. After months of development, emergency use was authorized ...

Several reports show women are experiencing stronger side effects to the vaccine than men and it isn't unique to COVID-19. “This has been observed time and time again,” said Dr. Monica Gandhi, an ...

Many continue to worry about experiencing side effects from vaccines -- especially the COVID-19 vaccines -- but new data from a comprehensive meta-analysis suggests there is little to fear. The study ...

If you're getting vaccinated, expect a sore arm. Pain at the injection site is the most common side effect of all three coronavirus vaccines authorized in the US. In general, the vaccines produce mild ...

The new 2026-2027 COVID-19 vaccines are available. Experts explain who should get one the shots and why, the best time to get vaccinated, side effects and more.