Giving COVID survivors just one dose of the vaccine could help end the pandemic faster In South Korea, an analysis that included more than 500000 people age 60 and older found that the Pfizer vaccine was 89% effective in preventing infection just two weeks after the first shot. AstraZeneca’s vaccine, which has not been authorized for emergency use in the U.S., was found to be 86% effective in that same time period. Again, that’s after a single dose, and it’s regardless of prior COVID history.
Commentary: Getting a second dose of Pfizer or Moderna’s coronavirus vaccine might not be necessary for COVID survivors.
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