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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. 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 ...

  4. COVID-19 Vaccine and Tinnitus: What We Know - Healthline

    www.healthline.com/health-news/is-the-covid-19...

    The risk of developing tinnitus — a ringing in one or both ears — after COVID-19 vaccination appears to be low, and while some studies have identified a link between the two, more data is ...

  5. 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 ...

  6. New COVID Vaccine 54% Effective at Preventing Symptoms - WebMD

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

    The 54% vaccine effectiveness is based on a study from September through earlier this month of 9,222 COVID tests in the Community Access to Testing SARS-CoV-2 pharmacy testing program. Both CVS ...

  7. 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 ...

  8. COVID-19 vaccination in the United States - Wikipedia

    en.wikipedia.org/wiki/COVID-19_vaccination_in...

    The COVID-19 vaccination campaign in the United States is an ongoing mass immunization campaign for the COVID-19 pandemic in the United States. The Food and Drug Administration (FDA) first granted emergency use authorization to the Pfizer–BioNTech vaccine on December 10, 2020, [7] and mass vaccinations began four days later.

  9. COVID Vaccine Booster: Everything You Need to Know - WebMD

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

    The CDC recommends an additional booster shot for certain people to amp up their immune system against potential COVID-19 variants. If you got the J&J Janssen vaccine as your first vaccine and ...