1 janv. 1952 - A Vaccine For Polio Was Developed
Description:
Who: Jonas SalkWhat: He Develop a vaccine for polio and help many kids get vaccinated
Why:I chose this because many people woulkd have died to this dangurerus virus
Ajouté au bande de temps:
Date:
1 janv. 1952
Maintenaint
~ Il y a 73 ans