Published: March 24, 2021
Total Running Time: 00:04:16
The third COVID vaccine authorized in the U.S. works differently from the first two. Find out how viral vector vaccines work and how they’re different from mRNA vaccines.
Clarification: Of the COVID-19 vaccines currently used in the United States, the vaccines produced by Pfizer-BioNTech and Moderna have been granted full FDA approval. The vaccine produced by Johnson & Johnson has been granted Emergency Use Authorization during the pandemic but has not yet received full FDA approval, which will take more time.
For up-to-date information on COVID and vaccines, visit CDC.gov.