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[–] bf429 [S] ago 

Try actually watching the video before you open your mouth.

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[–] stature ago 

No reason to get emotional about it.

Your video is by "World-renown author and nutritionist Shawn Stevenson"

I can pick out NCBI studies too (masks are a risk reduction tool, just like distancing is a risk reduction tool)

https://pubmed.ncbi.nlm.nih.gov/25903751/

https://pubmed.ncbi.nlm.nih.gov/24229526/

https://pubmed.ncbi.nlm.nih.gov/28799710/

https://pubmed.ncbi.nlm.nih.gov/32512240/

https://pubmed.ncbi.nlm.nih.gov/27531371/