哮喘,这种变态反应性综合征正成为世界上多数发达国家最棘手的健康问题之一。据今年5月26号美国的《新闻周刊》报道,目前美国大约有1460万人(其中包括500万儿童)受到哮喘病的折磨,人们对以前几乎不会引起什么不适的一系列过敏原产生了哮喘反应。美国肺脏协会说,80年代以来,每年因此而死亡的人数几乎翻了一番。那么,是什么原因使世界范围内的哮喘病大量增加呢? Asthma, this allergic syndrome is becoming one of the most troublesome health problems in most developed countries in the world. According to the May 26 issue of the U.S. Newsweek, about 14.6 million people in the United States, including 5 million children, are now suffering from asthma and people have developed a series of allergens that used to cause almost no discomfort. Asthma reaction. The American Lung Association says the number of people who die each year since the 1980s has almost doubled. So, what is the reason for a massive increase in asthma worldwide?