Single dose enough for Covid survivors!
A person who has had Covid and receives a single dose of the Pfizer or Moderna vaccines is equally or better protected than someone who never had Covid and got two doses, according to a study published in the New England Journal of Medicine. For people who have had Covid before, "the first vaccine dose actually acts as a booster, making the second dose unnecessary," the study said. In the study, researchers looked at blood samples from 110 people, 67 of whom had not previously been infected and 43 who had. The scientists repeatedly sampled the participants and found that in the days following the first shot, antibody levels in those with previous infection were 10 to 45 times higher than those who weren't previously infected. By the time both groups received their second shots, antibody levels among those previously infected still registered six times higher than those who weren't previously infected.