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9 janv. 1954 - Polio Vaccine

Description:

The first vaccination of children against polio begins in Pittsburgh, Pennsylvania. People marveled at the high-success rate of the new vaccine. Cases of Polio dropped from around 15,000 cases to about 5,000 cases.

Ajouté au bande de temps:

The Good ol' Days 2018

ByKen Burrow
16 déc. 2018
0
0
734

Date:

9 janv. 1954
Maintenaint
~ Il y a 71 ans
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