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9 янв 1952 г. - Polio

Описание:

Jonas Salk develops first Polio Vaccine which is an inactive version of Polio and is administered via injection by trained health professionals, but is expensive.

Добавлено на ленту времени:

Diseases and Discoveries Related That Have Impacted Recorded Human History

ByTommy Chhoeum
14 дек 2018
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9 янв 1952 г.
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~ 73 г назад
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