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  2. Feb 9, 2021 · The Pfizer-BioNTech vaccine is 95 percent effective 7 days after the second dose. The Moderna vaccine is 94.1 percent effective 14 days after the second dose. After vaccination, it’s...

  3. Nov 3, 2023 · COVID-19 vaccines are safe and effective. The safety of COVID-19 vaccines has been rigorously monitored and evaluated since their emergency use authorization (EUA) in December 2020. T he updated mRNA COVID-19 vaccines f or 2023-2024 are manufactured using a similar process to the previous vaccines. Learn more about EUAs in this video.

  4. Nov 3, 2023 · Yes, COVID-19 vaccines are safe for people who have existing health conditions, including conditions that have a higher risk of getting serious illness with COVID-19. Your healthcare team may suggest you get added doses of a COVID-19 vaccine if you have a moderately or severely weakened immune system.

  5. The latest safety information from CDC on COVID-19 vaccines: safety studies, common side effects, vaccine schedules, vaccine package inserts, and more.

    • COVID-19 Vaccines and How They Work. How do vaccines work? Vaccines help people develop immunity to a virus or other germ. A vaccine introduces a less harmful part of that germ — or something created to look or behave like it — into a person’s body.
    • Getting the Vaccine. How many shots are in the COVID-19 vaccine? Pfizer’s and Moderna’s vaccines require two doses given several weeks apart (Pfizer’s second shot is given three weeks after the first, and Moderna’s is four weeks after the first).The COVID-19 vaccine from Johnson & Johnson requires only one dose.
    • Protection and Immunity. How long will it protect me? Will I have to get a COVID-19 shot every year? This is a question researchers are eager to answer. People who are infected with the coronavirus show a decline in protection within a few months, but their immunity may last significantly longer than that.
    • Vaccine Safety and Side Effects. How will we know if a COVID-19 vaccine is safe and effective? In order to be declared safe and effective, a COVID-19 vaccine must pass certain tests and standards.
  6. Yes. The two mRNA vaccines, Pfizer and Moderna, authorized by the U.S. Food and Drug Administration (FDA) and recommended by the Centers for Disease Control and Prevention (CDC), are very safe and very good at preventing serious or fatal cases of COVID-19. The risk of serious side effects associated with these vaccines is very small.

  7. Sep 27, 2023 · Print. Getting a COVID-19 vaccine is a safer and more dependable way to build immunity to COVID-19 than getting sick with COVID-19. FACT: COVID-19 vaccination causes a more predictable immune response than an infection with the virus that causes COVID-19. COVID-19 can cause severe illness or death.

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