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Comparing the COVID-19 Vaccines: How Are They Different?



The U.S. Food and Drug Administration has granted emergency use authorizations for three COVID-19 vaccines so far. We compare the different available shots, and several still in the approval process for use in the Untied States.

Which vaccines are approved already?

The Pfizer-BioNTech and Moderna vaccines have been available to Americans since December.

A vaccine developed by Janssen Pharmaceuticals, a Johnson & Johnson company, was authorized in late February.

AstraZeneca, working in collaboration with Oxford University, is expected to request authorization from the FDA for their vaccine within a few weeks, and Novavax is expected to follow with its application later in April or May.

What technology does each vaccine use?