Scientists don't expect boosters to yield worse side effects than the second shot, nor any higher risk of severe allergic reactions. 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%. That number rose to 59% after the second dose. (If you've had COVID-19 before, though, your first dose may yield more intense side effects than your second.)Īfter their first Pfizer shot, 47% of adults ages 18 to 55 reported fatigue. That's why side effects are generally more pronounced. 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.īy the time we receive a second dose, our bodies have learned to recognize that protein quickly, so are ready to attack it. While it does vary from person to person, side effects from COVID booster shots generally resemble the side effects present after a second dose of the Pfizer or Moderna vaccines, or. The mRNA vaccines from Pfizer and Moderna instruct the body to produce a harmless viral protein, then develop antibodies against it. In its booster trial, participants saw 3.3 times higher antibody levels one month after the booster than one month after their second dose.Ī 12-year-old receives a band-aid after getting the Pfizer COVID-19 vaccine in Los Angeles County, May 14, 2021. The agency said others who might consider a booster include younger adults with underlying medical conditions or those at increased risk of COVID-19 exposure because of their job or living arrangement.ĭata from Pfizer shows that protection from its vaccine declines over time, and that a third dose is safe. It is also possible that this swelling will show up on imaging tests and could be. On Thursday, the Centers for Disease Control and Prevention recommended a booster at least 6 months after the second dose for: People 65 years and older, nursing home residents, and people ages 50 to 64 with underlying medical conditions. Some people may experience some swelling or tenderness in their lymph nodes. That includes people who are more likely to get sick because of their health status, as well those who are at high risk of exposure due to where they live and work - such as healthcare workers, teachers and daycare staff, grocery store workers, and residents of homeless shelters or prisons. The FDA has authorized a third dose, or "booster," for people 65 years and older and others at high risk of severe COVID-19. It often indicates a user profile.Ī third dose of Pfizer's coronavirus vaccine yields mild to moderate side effects, much like the second shot, according to data released this month by the Food and Drug Administration. Account icon An icon in the shape of a person's head and shoulders.
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