最終更新日：2023/09/03
Variolations were a common practice in the 18th century to prevent smallpox.
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Variolations were a common practice in the 18th century to prevent smallpox.
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Variolations were a common practice in the 18th century to prevent smallpox.
Variolations were a common practice in the 18th century to prevent smallpox.
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