1 gen 1952 anni - A Vaccine For Polio Was Developed
Descrizione:
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
Aggiunto al nastro di tempo:
Data:
1 gen 1952 anni
Adesso
~ 72 years ago
