FDA Objects to COVID Vaccine Dosage Changes

The U.S. Food and Drug Administration urged that vaccines be given according to how the agency has authorized them, in a clear rebuke to health officials attempting to alter the timing and dosage of shots.

The agency, in a statement late Monday, urged that vaccines be given according to how the FDA has authorized them after a key U.S. official proposed cutting dosage levels for Moderna Inc.’s shot as a way to immunize more people. Governments and health officials have also considered extending the length of time between doses or mixing and matching vaccines.