Among the cases later discovered was a large influenza outbreak near Perote, a small town in Veracruz state, which was reported on April 2.
后续发现的病例是4月2日所报道的维拉克鲁斯州小镇Perote附近的流感疫情大爆发。小镇附近有一个由一家美国大型猪肉商的一个合资企业运营大型养猪场。
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