此病毒廣泛存在於人體與自然界中，應屬人類正常毒群。通常並不發病，沒有必要用疫苗免疫。

來源: 大江川於 2013-11-11 16:17:22 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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