7h 24min, jun 9, 1796 y - Small Pox Vaccine Developed
Description:
Edward Jenner identified the fact that those who had previously been exposed to cowpox were immune to smallpox. He used this discovery to develop the first successful vaccine against smallpox, which would later be eradicated.Added to timeline:
Date:
7h 24min, jun 9, 1796 y
Now
~ 229 years ago