還有個問題請教，為什麽要打疫苗？我一般主張鍛煉身體增強抵抗力。如果每年都打疫苗會不會讓身體產生依耐？

來源: 數鴨子123 於 2015-10-28 17:50:37 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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