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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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1 gen 1952 anni - A Vaccine For Polio Was Developed

Descrizione:

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

Aggiunto al nastro di tempo:

Heath Science

ByNathan Vong
10 feb 2020
0
0
293

Data:

1 gen 1952 anni
Adesso
~ 73 years ago
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