科學是開放係統不講絕對，總是權衡利弊評估風險做取舍，所以你要求一個絕對安全的疫苗沒有一個科學家能滿足你。

來源: 業餘城管於 2021-09-19 10:42:00 [舊帖] [給我悄悄話] 本文已被閱讀：次

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