oldest known mentioning of vaccine like things (jan 24, 1499 – jul 29, 1582)
Description:
Douzhen Xinfa (痘疹心法) was talking about a method of "nasal insufflation" administered by blowing powdered smallpox material, usually scabs, up the nostrils.
Added to timeline:
history of vaccines
this is for school :'D
Date:
