On August 31, 2022, the Food and Drug Administration (FDA) approved two new bivalent COVID-19 booster vaccines by Pfizer and Moderna respectively.
Both vaccines target the original virus strain, as well as the latest prevalent strains of Omicron—the BA.4 and BA.5 subvariants. These strains are currently responsible for almost all new cases of COVID-19 infection in the United States.
Moderna’s new bivalent booster has been authorized for use among people aged 18 years or older, while Pfizer’s booster has been approved for persons aged 12 years or older.
Data From 8 Mice? Evidence for Pfizer and Moderna’s New Booster Vaccines Insufficient
I was surprised to see this piece of news, because no clinical data related to these two BA.4/5 bivalent vaccines could be found….