Masks, do they work? Collection of definitive studies, 2020
2 years ago
73
July 2020. This is a 15 minute extract from a debate that scientist Denis Rancourt had on masks on Digi-Debates https://denisrancourt.ca/videos.php?id=6&name=2020_07_25_digi_debates_the_face_mask_debate_david_kyle_johnson_vs_denis_rancourt
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