Differentiating Approved COVID-19 Vaccines and Boosters
On December 11, 2020, the US Food and Drug Administration (FDA) issued an emergency use authorization (EUA) for the first vaccine against COVID-19, the Pfizer-BioNTech COVID-19 vaccine.1 This announcement was quickly followed by EUAs of the Moderna COVID-19 vaccine on December 18, 2020, and the Johnson & Johnson COVID-19 vaccine on February 27, 2021.2,3 Most mass…