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29 mars 1954 - Measles vaccine

Description:

Safe, effective vaccine devloped
Mass immunization camoaign started to reduce casses of measles in developed countries

Ajouté au bande de temps:

new disease

ByTassya
14 déc. 2018
1
0
560

Date:

29 mars 1954
Maintenaint
~ Il y a 71 ans
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