NPR News: Emily Oster: Why wasn't the US tracking the spread of COVID-19 in schools?

Emily Oster: Why wasn't the US tracking the spread of COVID-19 in schools?
In summer 2020, parents faced so many unknowns when it came to sending kids to school. Economist Emily Oster describes how she started collecting data nationwide to help parents decide for themselves.

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Làm đẹp Blog 247 November 12, 2021 at 09:22PM
Category Science