4 ms·
Evidence of variolation goes back to the 15th century https://en.m.wikipedia.org/wiki/Variolation#China https://en.m.wikipedia.org/wiki/Variolation#China
by buck4roo 5y ago
Evidence of variolation goes back to the 15th century
https://en.m.wikipedia.org/wiki/Variolation#China https://en.m.wikipedia.org/wiki/Variolation#China