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相信很多人还对2009年4月25日墨西哥爆发的甲型H1N1型流感记忆犹新,之后,那次流感迅速在全球范围内蔓延,当年6月份,世界卫生组织宣布甲型H1N1流感进入全球流行阶段。时隔4年,甲型H1N1型流感再次悄然来袭。受极寒天气影响,北京近期流感发病率攀升。2012年12月24日至12月30日的流感监测数据表明,在北京市二
I believe many people still remember the Influenza A (H1N1) outbreak in Mexico on April 25, 2009. After that, the flu spread rapidly around the world. In June of that year, the WHO announced that the influenza A (H1N1) virus has entered the global epidemic stage. A lapse of 4 years, A H1N1 influenza again quietly struck. Influenced by the arctic weather, the recent flu incidence in Beijing has risen. Influenza surveillance data from December 24 to December 30, 2012 shows that in Beijing II