Adults who received an initial J&J COVID-19 vaccine should receive a Pfizer or Moderna booster at least two months later for the best protection, according to a study released yesterday by the Centers for Disease Control and Prevention. The study examined 80,287 emergency department/urgent care visits and 25,244 hospitalizations in 10 states between Dec. 16, 2021, and March 7, 2022, when omicron was the predominant variant, and found adults who received a Pfizer or Moderna booster after the J&J vaccine were better protected than those who received one or two J&J doses. 

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