人痘疫苗的�明是�国医学史上的一项重大成就.1796年英国医生琴纳�明了牛痘疫苗接种牛痘最终导致完全根除天花并且推广为对抗许多病原体的可靠 Template




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tomski人痘疫苗的�明是�国医学史上的一项重大成就.1796年英国医生琴纳�明了牛痘疫苗接种牛痘最终导致完全根除天花并且推广为对抗许多病原体的可靠 coloring