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美国之音
9 天
美疾控中心:在美国首起人类禽流感重症病例病毒样本中发现突变
美国疾病控制与预防中心(CDC)星期四(12月26日)说,该中心对美国上星期首例禽流感重症病例的样本分析显示,与从患者住宅后院的受感染禽鸟群中收集的样本相比,该样本发生重大突变。
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