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从非典、禽流感到现在的甲型H1N1流感,近几年来流行性呼吸疾病盛行,究其根本原因,就在于人们的呼吸系统免疫力大大下降,对外界病菌的防御变得异常脆弱。
From SARS to avian influenza A (H1N1) influenza, the prevalence of epidemic respiratory disease has been prevailing in recent years. The fundamental reason lies in the fact that people’s respiratory system immunity is greatly reduced and their defense against external germs becomes extremely fragile.