人痘接种于是逐渐流传各阶层，以至全欧洲。
The nobility soon followed the example, and the practice gradually extended among all ranks, and to all Europe.
人痘接种预防天花是中国古代医学家的伟大发明。
Smallpox inoculation or variolation is a great invention of medicine in ancient China.
文摘：人痘接种预防天花是中国古代医学家的伟大发明。
Abstract: Smallpox inoculation or variolation is a great invention of medicine in ancient China.
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