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  2. Oct 7, 2021 · However, vaccines are cleared from your body in mere days or weeks. It’s the immune response against the SARS-CoV-2 virus that appears to last for a long time.

  3. Aug 31, 2021 · How long immunity lasts: Studies have suggested immunity will likely last at least 6 months. Protection against variants: Moderna found in May 2021 that a booster shot of the vaccine after...

  4. How long do spike proteins last in the body? The Infectious Disease Society of America (IDSA) estimates that the spike proteins that were generated by COVID-19 vaccines last up to a few weeks, like other proteins made by the body. The immune system quickly identifies, attacks and destroys the spike proteins because it recognizes them as not ...

  5. May 1, 2024 · How well a COVID-19 vaccine protects you also depends on timing, such as when you got the shot. And your level of protection depends on how the virus that causes COVID-19 changes and what variants the vaccine protects against. Talk to your healthcare team about how you can stay up to date with COVID-19 vaccines.

    • 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. Oct 23, 2023 · How long does the COVID vaccine last? Studies suggest COVID vaccines are most effective in the first few months following your shot. That’s why when health experts recommend boosters or updated doses, they’re usually given three to four months after your last COVID shot.

  7. May 8, 2024 · Key Takeaways. How long COVID-19 stays in the body varies from person to person. Generally, people are no longer contagious about 10 days after symptoms first develop. COVID vaccination appears to significantly shorten infection times along with the length of time a person is contagious.

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