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1 янв 1952 г. - A Vaccine For Polio Was Developed

Описание:

Who: Jonas Salk

What: 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:

Heath Science

ByNathan Vong
10 фев 2020
0
0
293

Дата:

1 янв 1952 г.
Сейчас
~ 73 г назад
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