![]() Indeed, side effects of the boosters are mimicking those of the initial doses, as you can see from the near-identical data that Pfizer submitted to the Food and Drug Administration after its studies: 61.5% of study participants developed fatigue, 54% had headaches and 39.3% dealt with muscle pain after getting Pfizer's second shot. But their immune systems are responding in other ways - albeit more gradually. Those receptors don't work as well in older people, so side effects could be less noticeable in them. One of those ways is by triggering certain receptors on immune cells, and that can result in fatigue, headaches and other common side effects, as observed in a small University of Pennsylvania study. That's because the vaccine provides protection in a few different ways. ![]() Your body's response might not do anything outwardly." "But if you don't, I wouldn't say it's not working. If you do get side effects, "at least you know it's working," says Charlotte Baker, a professor of epidemiology at Virginia Tech. That holds true for the boosters - which is especially good news in light of preliminary data showing that the Pfizer-BioNTech booster appears to work about as well against the omicron variant of the coronavirus as earlier doses did against earlier variants. If you don't have symptoms, "consider yourself lucky," Stanford University infectious disease physician Abraar Karan said in February. Paul Offit, an immunologist and the director of the Vaccine Education Center at Children's Hospital of Philadelphia, told NPR in April. "This is the first vaccine in history where anyone has ever complained about not having symptoms," Dr. ![]() You're in luck: Just as they did after the first round of shots, experts are quick to reassure that the vaccine works regardless of how you feel afterward. What's immune evasion? Epistasis?Īfter I got my initial COVID-19 vaccine, my head hurt and my muscles ached. ![]() "I haven't seen as much with Moderna, so it's going be interesting because they're using a half dose, whether they'll see less of the both local and systemic side effects but also whether there will be less of this swollen lymph node issue as well."įor the Moderna vaccine, the booster shot is a half dose of what was used for the initial vaccination series, the doctors noted, while Pfizer and J&J booster shots use the same dose.Goats and Soda Coronavirus FAQ: Help me with omicron vocab. "There's some evidence that the rates and severity of the Pfizer vaccine in the booster are almost identical to the second dose," Boston Medical Center's Dr. Israeli data suggests that the booster shot might be a little bit easier to tolerate than the second dose, Dr. Will the booster side effects be as bad as the second dose? ![]() The data available for J&J was more limited, but people reported fever, fatigue and headache after receiving a second dose of that vaccine, according to the agency. "I'm certainly hearing a lot about that, you know, and it may be more than the first and second shot but it is harmless." Shira Doron of Tufts Medical Center said. "With the Pfizer booster, and I think this has been confirmed, there appears to be a fair amount of swelling of the lymph nodes in the underarm area on the side of the vaccine," Dr. The most common side effects reported after getting a third shot of an mRNA vaccine, the type made by Moderna and Pfizer, were pain at the injection site, fatigue, muscle pain, headache and fever, followed by chills and nausea. Local doctors, clinics and pharmacies can start administering COVID vaccine booster shots Friday in Massachusetts now that federal health officials approved the mix and match approach. ![]()
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