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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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30 abr 1796 año - Jenner performed key experiment

Descripción:

treated lady for cowpox then transferred fluid from pustule on her arm to young boy who recovered after 9 days. when innoculated with smallpox he showed no symptoms

Añadido al timeline:

History of Medicine

Bylisa
14 dic 2017
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0
941

fecha:

30 abr 1796 año
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~ 229 years ago
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