Facial Masking : Potential “Variolation” ?
https://www.nejm.org/doi/full/10.1056/NEJMp2026913
Dr. Gilbert DERAY :
https://twitter.com/GilbertDeray/status/1303574326856298497
Mask Types :
https://wwwnc.cdc.gov/eid/article/26/11/20-3003-t1
https://en.wikipedia.org/wiki/Variolation
https://fr.wikipedia.org/wiki/Variolisation