Arizona State University: ASU-led study finds use of respirator masks could have prevented spread of COVID-19

Arizona State University: ASU-led study finds use of respirator masks could have prevented spread of COVID-19. “The researchers formulated a basic mathematical model for the transmission dynamics of COVID-19 in a population where a certain proportion habitually wear face masks. They considered four categories of face masks: cloth masks (with estimated efficacy of 30%), improved cloth masks or poorly fitted surgical masks (with estimated efficacy of 50%), properly fitted surgical masks (with estimated efficacy of 70%) and properly fitted respirators (with estimated efficacy of 95%).” Respirators are those stiff, pointy masks. You might have heard them called N95 masks.

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