Is the Pfizer vaccine safe? - Health, Medical and Fitness News Blog

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Tuesday, November 10, 2020

Is the Pfizer vaccine safe?

So far Pfizer and BioNTech have reported no serious safety concerns from their vaccine. Before running the current large-scale study, the companies ran smaller clinical trials starting in May that were specifically designed to detect warning signs about the vaccine’s safety. They tried out four versions of their vaccine and selected the one that produced the fewest cases of mild and moderate side effects, such as fever and fatigue.

If their vaccine receives an emergency authorization from the F.D.A. and gets distributed to millions of people, the Centers for Disease Control and the F.D.A. will monitor them to make sure there’s no evidence of even rarer safety issues.

Participants in the trial will also be monitored for two years.

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