FDA Tells Vaccine Makers to Update Boosters to Target Omicron Subvariants

By Steven Reinberg and Robin Foster HealthDay Reporters

THURSDAY, June 30, 2022 (HealthDay News)

The U.S. Food and Drug Administration announced Thursday that it has asked vaccine makers to update their COVID-19 booster shots to target the Omicron subvariants known as BA.4 and BA.5.

The two highly contagious subvariants now

for more than half of all new…