What are the risks to getting a booster?

 For many who have completed their primary series with Pfizer-BioNTech vaccine, the benefits of getting a booster shot outweigh the known and potential risks. So far, reactions reported after the third Pfizer- BioNTech shot were similar to that of the 2-shot primary series. Fatigue and pain at the injection site were the most commonly reported side effects, and overall, most side effects were mild to moderate. However, as with the 2-shot primary series, serious side effects are rare, but may occur.