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Abstract: 

The increasing prevalence of new coronavirus variants is raising questions about how well protected those who’ve already had their COVID-19 shots are against evolving forms of the SARS-CoV-2 virus. Here, microbiology and infectious disease specialist William Petri of the University of Virginia answers some common questions about COVID-19 booster shots: what is a booster shot; are boosters necessary; why are some people not good candidates for Covid-19 booster shots; how to determine if you need a booster; who do the CDC and FDA recommend should get a booster; and whether a third dose needs to match the first two.

Keywords: Covid-19 Vaccine Booster Shots

Affiliations:  1: University of Virginia.