In this period, the methods adopted mainly were keeping off it, praying gods and vaccination.
这一时期预防天花的做法大体上有避痘、祈神和推行种痘术。
Though science may devise methods of improving the quality of life and this is laudable, it should never usurp gods sovereignty over life and death.
科学可能发现方法，改善生活质素，值得赞美，但绝不能僭取天主掌握生死的主权。
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