公共衛生，流行病傳染病減少。那個時候的農村醫生手冊，很大篇幅是關於普及衛生習慣的。

來源: borisg 於 2021-12-10 10:48:53 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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