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Students who wore masks and were vaccinated did not catch COVID in the classroom

Viral DNA did not match peers in all suspected cases

Article authors :

Bloomberg News

Bloomberg News

Carrie Goldberg

Students' desk adhere to social distancing requirements in a classroom at a public elementary school in the Brooklyn borough of New York.
In a public elementary school classroom in Brooklyn, New York, student desks adhere to social distancing requirements. Photo by Jeenah Moon /Photographer: Jeenah Moon/Bloomb

Vaccinated and wearing mask College students who had virtually no chance were likely to contract COVID-19 in the classroom last fall, according to a sweeping study of 33,000 Boston University students who step up standard precautions. I got taller.

Researchers scoured college health records to find nine pairs of her students who developed COVID at about the same time, and were able to study together without social distancing. attended classes and suggested that they had no known contacts outside of school. that they may have passed it on in the classroom. However, genomic analysis of coronavirus samples from the group indicated that they were all likely infected elsewhere. We were cousins, but no closer than that," said co-author John Conner, a virologist at the Boston University School of Medicine. He said the study, published in the journal JAMA Network Open, provides answers to common nervous questions last fall. How do you know they won't get sick?"

The university was able to conduct this study because of a comprehensive in-house approach that included DNA analysis of viral samples. Thanks to the test program. The semester under study included 140,000 class meetings with an average of 31 students, virtually all of whom were vaccinated as needed. The classroom was well ventilated, researchers said.

Masking in class was mandatory at the time the samples were taken, in contrast to this fall when many universities will lift their requirements. Another difference between then and now is that while last fall the delta variant was dominant, now he is dominated by highly contagious omicron variants like BA.5.

While these differences are certainly important, Conner said, the study's finding that there was negligible in-class transmission among students who wore masks and were vaccinated was a sign of an outbreak.

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