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COVID booster shot side effects: Will you feel as sick this time?

Now that COVID booster shots are going to be available in the next 30 days, as Americans get closer to the September 20 rollout date of Pfizer and Moderna COVID-19 vaccine booster dose a common question has circulated: What side effects should you expect?

Health officials have approved booster shots of the COVID-19 vaccine if you received the Pfizer or Moderna versions. There hasn’t been enough data yet on the Johnson & Johnson vaccine to warrant a second dose of that one.

Studies have shown enhanced protection for those who get a third dose of the Pfizer or Moderna- mainly because vaccine protection does diminish after six months.


Health experts say the booster shots will offer enhanced protection from COVID-19 and new strains of the virus. While reactions to that shot will be similar to those felt when getting the flu shot.

“Sometimes you may get a reaction to it, sometimes you may not get a reaction to it,” Dr. Lo’ay Al-Asadi, a pulmonologist explained.

This is crucial because of the number of cases of long-term health issues posed by COVID-19. In most cases, experts say the reaction will be less than that from the first or second shot.



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