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  1. Sep 25, 2023 · Local effects typically appear within a couple of days following vaccination and persist for around 3 days. Systemic reactions, such as headaches, fever, and fatigue, often begin within the first ...

  2. Dec 11, 2021 · 12 Hours After Vaccination. Other side effects may start within a few hours, or up to 12 hours after the shot. People commonly report systemic side effects, like fever, headaches, muscle aches, joint pain, chills, and fatigue. In the Pfizer-BioNTech vaccine trials, more than 77% of participants reported at least one systemic reaction.

  3. Apr 30, 2024 · Moderna’s vaccine has been shown in trials to be very effective—preventing COVID-19 in 94.1% of the people enrolled in the Phase 3 clinical trial. Additionally, the vaccine seems to have broad efficacy, with success rates consistent across various age, race, ethnicity, and gender groups.

  4. Feb 27, 2024 · As we’ve said, Hviid calculated the rate of this side effect — if ultimately shown to be related to vaccination — to be 1 in 1.75 million following the first dose of the Moderna vaccine.

  5. May 6, 2021 · The FDA’s fact sheet for this vaccine lists the following general side effects. Also, we have included the percentages of frequency reported in Moderna’s phase 3 clinical trial data: . fatigue ...

  6. The Moderna COVID-19 Vaccine or SPIKEVAX (COVID-19 Vaccine, mRNA) will be given to ... WHAT SHOULD I DO ABOUT SIDE EFFECTS? If you experience a severe allergic reaction, call 9-1-1, or go to the ...

  7. May 1, 2024 · Side effects that don't go away after a few days are thought of as long term. Vaccines rarely cause any long-term side effects. If you're concerned about side effects, safety data on COVID-19 vaccines is reported to a national program called the Vaccine Adverse Event Reporting System in the U.S. This data is available to the public.

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