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How expensive is the Corsi/Rosenthal Box?

    You can build one of these for just under $100, and it will help significantly remove respiratory aerosols that contain SARS-COV-2 from the air. We recommend at least 2 of them in a normal sized classroom. $200. Keep in mind… Read More »How expensive is the Corsi/Rosenthal Box?

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    • Aranet4 CO2 monitor coupon
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    • Fit testing at home methods
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