3rd Covid vaccine shows side effects similar to 2nd shot, CDC says

Americans who received a third dose of a coronavirus vaccine in recent weeks have reported side effects at about the same rates as after...


Americans who received a third dose of a coronavirus vaccine in recent weeks have reported side effects at about the same rates as after their second injection, the The Centers for Disease Control and Prevention said on Tuesday, reassuring sign about the safety of additional doses.

At the time of the CDC study, which ran from mid-August to mid-September, additional vaccine doses were only allowed for people with weakened immune systems who have received two doses of Pfizer-BioNTech or Moderna vaccine. Last week, however, federal regulators cleared Pfizer’s booster shots for large swathes of the general population, making the safety of additional doses a matter of intense interest to health officials, physicians, and others. ordinary Americans.

The CDC analyzed how often people reported side effects after a third dose versus a second among 12,600 recipients who had completed surveys as part of a voluntary safety monitoring system.

Injection site reactions, such as pain or swelling, were reported by 79.4 percent of recipients after a third dose of vaccine, compared with 77.6 percent after a second dose. Slightly fewer people experienced systemic reactions, such as fever or headache: 74.1% of people reported these side effects after the third dose, compared to 76.5% after the second dose.

“Most of the reported local and systemic reactions were mild to moderate, transient, and most often reported the day after vaccination,” said the study authors.

The study focused on people who received a third dose of the same vaccine they originally received, either from Pfizer-BioNTech or Moderna. The CDC said too few people reported receiving an extra dose of the Johnson & Johnson vaccine, or an extra dose from a different vaccine manufacturer than they originally received, to study these side effects.

The results reinforced the findings of a small clinical trial of third injections of the Pfizer vaccine that company scientists presented to federal medical advisers last week. This trial also found that the side effects after a third dose were similar to those after a second.

While the CDC study only covered a period during which people with immune problems were eligible for additional doses, the data likely also included people without such conditions who nevertheless received a third injection, the authors wrote. of the study. In total, according to the study, about 2.2 million people had received additional doses as of September 19, the end of the CDC’s study period.

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Newsrust - US Top News: 3rd Covid vaccine shows side effects similar to 2nd shot, CDC says
3rd Covid vaccine shows side effects similar to 2nd shot, CDC says
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