jul 17, 1796 - Jenner’s smallpox vaccine
Description:
Jenner began to study cowpox which was similar to smallpox but it was harmless compared to the deadly smallpox. During his studies he found out that He hypothesized that exposure to cowpox would make the body immune to smallpox, this lead to him making his first vaccine.Added to timeline:
Date:
jul 17, 1796
Now
~ 230 years ago