Study shows mixing and matching booster shots is safe and effective
A U.S. Food and Drug Administration advisory committee will begin meeting Thursday to discuss whether to approve Moderna and Johnson & Johnson's booster shots. As KTVU's Amanda Quintana reports, a new study shows that people who originally got a Johnson & Johnson shot might get more protection from a Pfizer or Moderna booster.
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Study shows mixing and matching booster shots is safe and effective
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