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If high resolution video is to be believed, masks reduce how many particles get into the air when we cough, sneeze or talk. https://www.youtube.com/watch?v=H2a
by stretchwithme 5y ago
If high resolution video is to be believed, masks reduce how many particles get into the air when we cough, sneeze or talk.
https://www.youtube.com/watch?v=H2azcn7MqOU https://www.youtube.com/watch?v=H2azcn7MqOU