School closures that swept several US states from March to May might have led to a million fewer Covid-19 cases and saved more than 40,000 lives, a new study suggests.
The states that closed schools earlier, when the cumulative incidence of Covid-19 cases was lowest, saw the greatest declines per week at the time, compared with states that were slowest to close schools and had the highest cumulative incidence of Covid-19, according to the study, published in the medical journal JAMA on Wednesday.
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