People who received a third dose of Pfizer 's vaccine frequently reported headaches and fatigue.
After a third shot of Pfizer 's vaccine, injection-site pain is most common side effect, followed by fatigue and headache.
9%Fever up to 38 degrees Celsius:8%Half of the surveyed adults said the booster shot yielded worse side effects than the second dose. But the other half said the booster side effects were the same or milder compared to dose two.Inanother surveyfrom Clalit Health Services, Israel's largest healthcare provider, 88% of participants said they felt "similar or better" after their Pfizer booster than after dose two. That survey included around 4,500 people. Just 31% of them reported localized side effects like pain or swelling at the injection site.
How the first 2 doses compare to a booster shotA 12-year-old receives a band-aid after getting the Pfizer COVID-19 vaccine in Los Angeles County, May 14, 2021.Patrick Fallon/AFP/Getty ImagesThe mRNA vaccines from Pfizer and Moderna instruct the body to produce a harmless viral protein, then develop antibodies against it. The first dose of Pfizer's vaccine generally
produces the mildest side effects, since our bodies are being introduced to the instructions and the resulting protein for the first time.By the time we receive a second dose, our bodies have learned to recognize that protein quickly, so are ready to attack it. That's why side effects are generally more pronounced. (If you've had COVID-19 before, though, your first dose may yield more intense side effects than your second.) headtopics.com
After their first Pfizer shot, 47% of adults ages 18 to 55 reported fatigue. That number rose to 59% after the second dose. Reports of a headache also rose from 42% to 52% from the first to second dose, while reports of muscle pain rose from 21% to 37%.
Scientists don't expect boosters to yield worse side effects than the second shot, since our bodies are responding in the same way - by fighting off a familiar threat. Boosters shouldn't carry a higher risk of severe allergic reactions, either.Read more: Yahoo Singapore »
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Side effects is still too early to say
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