Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Blood letting 18th- 19th century: artificial leeches. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Blood letting 18th- 19th century: artificial leeches. Wellcome Collection. Source: Wellcome Collection.