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FDA Sends Rebuke to Officials Seeking to Alter Vaccine Regimen

Covid-19 Vaccination Center As Germany's Vaccine Rollout Faces Criticism
Photographer: Alex Kraus/Bloomberg

The U.S. Food and Drug Administration delivered a clear rebuke to health officials attempting to alter the timing and dosage of Covid-19 vaccines: Don’t mess with our guidelines.

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.