What Do We Still Hope to Find Out About Messenger RNA (mRNA) COVID-19 Vaccines?
- Do the vaccines prevent infection with coronavirus?
- How long do the vaccine effects last? Will booster shots be needed?
- Are the vaccines safe for children under 16 years, pregnant people, and people with weaker immune systems?
Masks Are Still Needed to Stop the Spread of Coronavirus
Until we know if mRNA vaccines protect against infection, masks are still needed to stop the spread of coronavirus. Masks are the best way to stop the spread of droplets from your mouth and nose to others.
Content last reviewed on May 12, 2021