Prognosis

U.S. Backs Boosters for All in Bid to Blunt Virus Resurgence

  • Federal officials endorse wider booster use as cases climb
  • States facing new Covid wave had begun to act on their own

A pharmacist administers a third dose of the Moderna vaccine to a customer at a pharmacy in Livonia, Michigan.

Photographer: Emily Elconin/Bloomberg
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Millions more Americans can now receive Covid-19 booster shots from Pfizer Inc. and Moderna Inc., after U.S. officials broadened what many state and local leaders and health-care providers had said were confusing initial eligibility guidelines.

Centers for Disease Control and Prevention Director Rochelle Walensky on Friday signed off on guidance that makes boosters available to all adults 18 and up who received a second dose of one of the messenger RNA vaccines at least six months earlier.