Smallpox Immunization

Smallpox Immunization

The earliest form of smallpox immunization was used in China in the 1500s. Doctors would take ground-up scabs from people with mild cases of the disease, and blow the material into their nostrils. This lead to a mild version of the disease which had a mortality rate of ~2% (20-30% if untreated).

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Categories: DiseaseHistory

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