日本、歐洲近年都有過,MMR隻要一放鬆監管,馬上幾年以後就傳染爆發。
回答: Amish 社區拒絕接受measles vaccine , 都有好幾次measles outbreak 了。另外,我們省,去年有
由 betadine
於 2015-12-27 11:25:04
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