7 h 24 m, 9 jun 1796 año - Small Pox Vaccine Developed
Descripción:
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.Añadido al timeline:
fecha:
7 h 24 m, 9 jun 1796 año
Ahora mismo
~ 229 years ago