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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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29 März 1954 Jahr - Measles vaccine
Beschreibung:
Safe, effective vaccine devloped
Mass immunization camoaign started to reduce casses of measles in developed countries
Zugefügt zum Band der Zeit:
new disease
By
Tassya
14 Dez 2018
1
0
552
Datum:
29 März 1954 Jahr
Jetzt
~ 71 years ago
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