University of Oxford. (2020). Oxford COVID-19 study: face masks and coverings work - act now. Retrieved from https://www.ox.ac.uk/news/2020-07-08-oxford-covid-19-study-face-masks-and-coverings-work-act-now

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A systematic review from the University of Oxford assessed evidence from multiple medical and behavioral research studies, including randomized controlled trials (RCTs). The review highlights a growing scientific consensus that face masks and coverings are effective, and emphasizes that proper usage by the public is a critical factor in their efficacy.

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