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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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9 oct 1791 año - German teacher vaccinated his 3 kids with cowpox
Añadido al timeline:
History of Medicine
By
lisa
14 dic 2017
0
0
933
fecha:
9 oct 1791 año
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~ 234 years ago
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