Quick guide: Most widely used COVID-19 vaccines and how they work

Editor’s notice: This article was final up to date on March 22, 2022, by Live Science workers author Nicoletta Lanese.

Dozens of coronavirus vaccines entered scientific trials throughout 2020, and now, greater than 20 completely different photographs are being administered to folks all over the world. Out of the 5 most generally used COVID-19 vaccines, three are cleared to be used within the United States. 

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