Many vaccines are currently being tested as a tool to combat the COVID-19 pandemic. This fact sheet explains the differences and similarities between the three vaccines approved for use in the U.S. by the Food and Drug Administration (FDA) as of March 15, 2021: the Pfizer vaccine, the Moderna vaccine, and the Johnson & Johnson (Janssen) vaccine.
Fact Sheet: COVID-19 Vaccines Approved for Use in the U.S.
May 28, 2021