防疫比治療要重要得多。世界上死亡率劇降的幾次除了青黴素的發現外幾乎都是防疫的功勞。

來源: 我是一元黨於 2016-01-29 15:30:44 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.