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Masked, Vaccinated Students Didn’t Catch Covid in Classrooms

  • Boston University researchers tracked 33,000 students in fall
  • In every suspected case, viral RNA didn’t match classmates’
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How the Global Vaccine Campaign Has Succeeded—and Failed

Vaccinated and masked college students had virtually no chance of catching Covid-19 in the classroom last fall, according to a sweeping study of 33,000 Boston University students that bolsters standard prevention measures. 

The researchers screened the college’s health records to find nine sets of students who developed Covid at about the same time, were in class together without social distancing and had no known contact outside school, suggesting that they might have transmitted it in the classroom. However, genome analysis of coronavirus samples from the groups showed that all of them more likely were infected in other places.