Studies of viruses, conducted by specialized WHO reference laboratories, can corroborate field investigations by spotting genetic and other changes in the virus indicative of an improved ability to infect humans.
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美
- WHO專(zhuān)門(mén)的參考實(shí)驗室對病毒進(jìn)行研究，定位病毒遺傳或其它方面的突變，確定病毒感染人的能力增強，從而確認現場(chǎng)調查。
