What We Know About Covid, the Flu and the Air We Breathehttps://www.nytimes.com/2021/10/19/opinion/covid-flu-air-transmission.html?fbclid=IwAR0Jlv0zXzF4qBs3O6btDLX_KdXsFjRKbA9n72GalK_Apy6KlQGswmEuoyw
https://www.nytimes.com/2021/10/19/opinion/covid-flu-air-transmission.html?fbclid=IwAR0Jlv0zXzF4qBs3O6btDLX_KdXsFjRKbA9n72GalK_Apy6KlQGswmEuoyw
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