If the confirmed deaths are the first signs of a pandemic, then cases are probably incubating around the world by now, said Dr.Michael Osterholm, a pandemic flu expert at the University of Minnesota.

• 如果证实死亡是首要的流行迹象，那么现在感染病例很可能已潜伏在世界各地，美国明尼苏达大学流感专家MichaelOsterholm博士如是说。