Booster shots approved for all vaccines

The Centers for Disease Control and the U.S. Food and Drug Administration (FDA) announced last week that emergency use authorizations have been granted for the Moderna and Johnson & Johnson vaccine booster shots. This means that all three of the vaccine types in use within the United States have now received approval for the booster program.

The FDA and CDC have also given approval to “mix n’ match” booster doses, which means the booster shot does not have to be the same brand as the original vaccine a person received.

“The available data suggest waning immunity in some populations who are ful...