1 ene 1796 año - A Vaccine For Smallpox Was Made
Descripción:
Who: Edward JennerWhat: He found out that people who had cowpox were immune to smallpox, so he tests his theory and tests it on a little boy who afters becomes immune to smallpox.
Why: Without this vaccine, many people would have died from it and our population would be very low.
Añadido al timeline:
fecha:
1 ene 1796 año
Ahora mismo
~ 228 years ago
