Do You Think a Fourth COVID Shot Is Necessary?

April 06, 2022

Adults older than 50 years of age and those 18 and older who are immunocompromised are now eligible for fourth doses of either Pfizer or Moderna's COVID-19 vaccines.

The US Food and Drug Administration granted emergency use authorizations for both Pfizer and Moderna to offer the second booster — and fourth shot overall — to these populations. Many top infectious disease experts questioned the need before the agency's decision. 


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