1 янв 1952 г. - A Vaccine For Polio Was Developed
Описание:
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
Добавлено на ленту времени:
Дата:
1 янв 1952 г.
Сейчас
~ 72 г назад
