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  1. The Biden administration announces that the U.S. will begin administering booster shoots of the Moderna and Pfizer–BioNTech vaccines for most people who received the second dose eight months ago beginning from September 20.
  2. The Biden administration announces that, beginning on September 20, the U.S. will begin administering booster shoots of the Moderna and Pfizer–BioNTech vaccines for most people who received their second dose at least eight months ago.

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