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HistoryOne small ahaFirst achievement

He tested cowpox-based vaccination against smallpox in 1796.

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HistoryOne small aha
Your new ahaEdward Jenner

Edward Jenner tested cowpox inoculation against smallpox in 1796 and published his findings in 1798. Earlier variolation used material from smallpox itself, a different and riskier practice. Source: Edward Jenner ↗

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