The FDA is overseeing the approval process for vaccines. It has released safety and efficacy guidelines for companies working on a vaccine. As these guidelines make clear, the COVID-19 vaccines under development and in trials must follow the same rigorous safety rules as any other new vaccine.
The FDA will only grant Emergency Use Authorization if it decides the benefits of a vaccine outweigh its potential risks.
Officials will continue monitoring the safety of vaccines after they are made available.
Side Effects Ongoing trials of COVID-19 vaccines have reported mostly mild or moderate symptoms after vaccination, including fever, body aches and soreness at the injection site. The vaccine cannot give you COVID-19.
In rare cases, people have had a severe allergic reaction to the vaccine. If you have had an allergic reaction to other vaccines in the past, or if you think you may be allergic to ingredients in the COVID-19 vaccine, talk to your health care provider before getting vaccinated.
mRNA Vaccines The Pfizer and Moderna vaccines are both messenger RNA (mRNA) vaccines. mRNA are molecules that provide instructions. They do not contain the virus.
mRNA vaccines teach our cells how to create an immune response so that the body knows how to fight the virus if it is later exposed to the virus. Once your body learns how to create the immune response, it breaks down and gets rid of the mRNA.