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  2. The Most Common Side Effects of the COVID-19 Vaccine - Healthline

    www.healthline.com/health/vaccinations/side...

    fever. headache. muscle pain. nausea. pain at the injection site. redness at the injection site. swelling at the injection site. According to the CDC, some people experience more side effects ...

  3. COVID-19 Vaccines - WebMD

    www.webmd.com/vaccines/covid-19-vaccine/covid-19...

    The vaccine should slow the spread of COVID-19 around the world. Fewer people should get sick, and more lives can be saved. The Pfizer, Moderna, and Novavax vaccines have been shown to be at least ...

  4. How Long After the Second Dose of the COVID-19 Vaccine Are ...

    www.healthline.com/health/how-long-after-the...

    Researchers found that the vaccine was 95 percent effective at preventing COVID-19 at this point. Moderna. The Moderna clinical trial looked at vaccine effectiveness 2 weeks after participants had ...

  5. Heart Arrhythmia After COVID Vaccine: A Rare Side Effect

    www.healthline.com/health/heart-arrhythmia-after...

    Heart problems are a very rare side effect of COVID-19 vaccines. More common side effects are mild and temporary, including: fever. pain and soreness at injection site. fatigue. headache. chills ...

  6. Chart: COVID Vaccines Compared - WebMD

    www.webmd.com/vaccines/covid-19-vaccine/covid...

    The Pfizer, Moderna, Novavax, and Johnson & Johnson vaccines are all highly effective in protecting you from the virus that causes COVID-19. The CDC says there’s a preference for the mRNA ...

  7. FDA Approves Updated Non-mRNA COVID Vaccine From Novavax - WebMD

    www.webmd.com/vaccines/covid-19-vaccine/news/...

    2 min read. Oct. 4, 2023 – The updated COVID-19 vaccine made by Novavax is now approved for use in the U.S., and millions of the doses are heading to pharmacies and other health care sites ...

  8. Covid-19 Vaccine and Heart Attack Risk: What the Research Shows

    www.healthline.com/health/covid-vaccine-heart-attack

    A cohort study published in the British Medical Journal estimated that only 1.7 out of 100,000 people go on to develop myocarditis or pericarditis within 28 days of getting their COVID-19 vaccine.

  9. Blood Donation and COVID-19 Vaccine: What to Know - WebMD

    www.webmd.com/vaccines/covid-19-vaccine/donate...

    No. Your body has about 10 pints of blood. When you donate blood, you only give about 1 pint. If you’ve had the COVID-19 vaccine, your antibody levels won’t go down after you give blood. Your ...