美国出现第二例人类因奶牛疫情而感染禽流感的病例
密歇根州一名奶牛工人被诊断出患有禽流感，这是美国奶牛禽流感疫情中的第二例人类病例。
https://www.voachinese.com/a/michigan-farmworker-diagnosed-with-bird-flu-becoming-2nd-us-case-tied-to-dairy-cows-20240522/7623554.html
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