U.S. officials observed that six years of concern about H5N1 avian flu did much to prepare for the current H1N1 flu outbreak, noting that after H5N1 emerged in Asia, ultimately killing about 60% of the few hundred people infected by it over the years, many countries took steps to try to prevent any similar crisis from spreading further.
美国官员指出6年来对H5N1禽流感病毒的关切，为应对当前甲型H1N1流感疫情做足准备，并指出H5N1病毒出现在亚洲后，多年来最终造成数百人中的60%受感染，许多国家已采取措施，尽量避免类似危机进一步蔓延。