Scientists know masks limit the coronavirus’s spread, but it’s impossible for randomized trials to prove that

skybrian
2020-11-07T21:48:25Z

Link URL: https://www.nytimes.com/2020/11/06/opinion/sunday/coronavirus-masks.html

Comments URL: https://tildes.net/~health/t51/scientists_know_masks_limit_the_coronaviruss_spread_but_its_impossible_for_randomized_trials_to

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