https://www.history.com/topics/middle-ages/black-death

https://www.history.com/news/a-brief-history-of-bloodletting
https://web.cn.edu/kwheeler/black_plague.html
https://www.cdc.gov/plague/history/index.html
https://www.nationalgeographic.com/science/health-and-human-body/human-diseases/the-plague/
https://news.nationalgeographic.com/2018/01/rats-plague-black-death-humans-lice-health-science/
https://worldhistory.us/medieval-history/could-anthrax-have-caused-the-black-death.php