How do we know the COVID-19 vaccine is safe?

The U.S. vaccine safety system ensures that all vaccines are as safe as possible. Safety is a top priority while federal partners work to make a COVID-19 vaccine(s) available. Vaccines undergo a series of rigorous clinical trials using thousands of study participants to generate data and other information for the Food and Drug Administration (FDA) to determine their safety and effectiveness to approve or authorize for emergency use. Following approval or authorization, many vaccine safety monitoring systems watch for adverse events or possible side effects. Visit the CDC’s website for more information about ensuring the safety of COVID-19 vaccines in the U.S.—including information about specific vaccine monitoring systems.

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1. What is a COVID-19 vaccine?
2. What is Operation Warp Speed?
3. How do we know the COVID-19 vaccine is safe?
4. Is a COVID-19 vaccine necessary?
5. Why would I need a vaccine if I can do other things — like social distancing, washing my hands and wearing a mask — to prevent the virus that causes COVID-19 from spreading?
6. What is Maryland doing to help make sure people can get vaccinated against COVID-19?
7. Does Prince George’s County have a campaign to address any concerns people may have about getting the vaccine?
8. What is an emergency use authorization (EUA) and how is it used to respond to COVID-19?
9. What percentage of the community needs to get vaccinated to have herd immunity to COVID-19?
10. How many doses of a COVID-19 vaccine will be needed? Will a second booster dose be needed?
11. Will a COVID-19 vaccine need to be given annually?
12. How long will it take before a COVID-19 vaccine is able to prevent serious illness for the recipient?
13. Will there be enough vaccine for everyone?
14. How will vaccinations be distributed as part of Maryland’s phased vaccination plan?
15. Will I have to pay for COVID-19 vaccination?
16. If you had the virus and recovered will you still need to get the vaccine?
17. Does immunity after getting COVID-19 last longer than protection from COVID-19 vaccines?
18. If I get the vaccine, do I still have to wear a mask and practice social distancing?
19. Will an influenza (flu) vaccine protect me from COVID-19?
20. Why is it important to get the flu vaccine during the COVID-19 pandemic?
21. What can I do to help protect myself from getting COVID-19 until I can receive a vaccine?
22. What phase of the vaccination distribution is Prince George’s County currently in? When will I be able to get the vaccine and where do I go?
23. What is a COVID-19 variant, and will the vaccine protect me from it?
24. When will the County move into additional phases of the vaccination distribution plan, and how will I sign up or be notified that I am eligible?