Study: 100% face mask use could crush second, third COVID-19 wave https://t.co/6YYPxtMFcb via @SFGate — Thomas Hammerlund 😷 (@thammerlund) June 12, 2020
Study: 100% face mask use could crush second, third COVID-19 wave https://t.co/6YYPxtMFcb via @SFGate
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