https://thelancet.com/journals/ebiom/article/piis2352-3964(24)00192-0/fulltext - discu.eu

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Study shows N95 masks near-perfect at blocking escape of airborne COVID-19 | University of Maryland | School of Public Health https://sph.umd.edu/news/study-shows-n95-masks-near-perfect-blocking-escape-airborne-covid-19 309 comments

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