DID YOU KNOW? for November 30 - December 13, 2021:  

DID YOU KNOW... An enslaved African man, Onesimus taught Cotton Mather how to inoculate against smallpox. The concept of immunization came to the American colonies via Africa. In the early 1700s, Puritan minister Cotton Mather learned from Onesimus, a man he enslaved, about a method long used in West Africa, where a weakened form of the disease would be intentionally applied to a cut.

Learn more…
https://www.history.com/news/smallpox-vaccine-onesimus-slave-cotton-mather