![]() ![]() People who are immunocompromised may need an additional dose to help them generate a robust immune response more in line with that of people with healthy immune systems. ![]() In August, the agency approved third doses of the mRNA vaccines for people with weakened immune systems. The FDA has not indicated when it will finish reviewing Pfizer’s booster application. This is the age range for which the two-dose regimen of the vaccine is fully approved. The company also announced last week that it has started submitting data to the FDA for its application seeking approval of a booster dose of its vaccine for Americans 16 years and older. The results have not yet been published in a peer-reviewed journal.Ī Pfizer spokesperson told the CDC’s vaccine advisory committee on August 30 that it may have additional booster study data by late September or early October, reported STAT’s Helen Branswell on Twitter. The frequency of these side effects was “similar to or better than after dose two,” the company said in a press release. Last week, Pfizer and BioNTech released results from a phase 3 clinical trial in which people were given a booster between 4 and 8 months after their second dose.Īs with studies on the initial vaccine series, the most common side effects were pain at the injection site, fatigue, headache, muscle and joint pain, and chills. ![]() “The few patients I have talked to that received the booster report fewer side effects ,” said Cackovic. Side effects after the third dose are also likely to vary from person to person, with some people experiencing minimal discomfort. Sixty-eight percent had only local reactions such as pain or tenderness at the site of injection. One study in the United Kingdom found that only 22 percent of people had systemic side effects such as fatigue, headache, or chills after the second dose of the Pfizer-BioNTech vaccine. Michael Cackovic, an obstetrician from The Ohio State University Wexner Medical Center, says there’s a lot of variation in side effects after the COVID-19 vaccines. Several clinical studies on the safety and efficacy of vaccine boosters are ongoing, but the limited available data suggests that the side effects will be similar to those of the first two doses.īooster side effects similar to initial dosesĭr. This is pending approval by the Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC).īut some people may already be wondering about the side effects of a third dose - especially those who were hard hit with fatigue or muscle pain after their second dose. 20, President Joe Biden’s administration announced in mid-August. People in the United States could begin receiving third doses of mRNA COVID-19 vaccines as early as the week of Sept.
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