7 h 24 min, 9 juin 1796 ans - 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.Ajouté au bande de temps:
Date:
7 h 24 min, 9 juin 1796 ans
Maintenaint
~ Il y a 229 ans