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Study hall Now, quite a year after the pandemic began, researchers know tons more about COVID-19. and that they know more about how the disease does (and doesn’t) spread. Although some kids and teachers have caught SARS-CoV-2, schools don’t seem to be environments where transmission is rampant. “The rates within the schools haven't been above within the community,” Høeg says.
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Tracking cases in schools is comparatively straightforward. But what public-health officials actually need to understand is whether or not students and staff are spreading the virus on school grounds, or simply bringing in cases they acquired elsewhere. That’s trickier to tease out.
One of the most important studies1 on COVID-19 in schools within the us checked out quite 90,000 pupils and teachers in North Carolina over 9 weeks last autumn. Given the speed of transmission within the community, “we would have expected to ascertain about 900 cases” within the schools, says Daniel Benjamin, a paediatrician at Duke Clinical Research Institute in Durham, North Carolina, and co-lead author on the study. But when the researchers conducted contact tracing to spot school-related transmissions, they identified only 32 cases (see ‘Meagre spread’).
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