据有关资料显示,目前,全球约有1亿以上的人患有哮喘,且发病率逐年上升,尤其是一些发达国家,如美国、英国、新西兰等,其发病率达到了10%以上。近年来,我国几个大城市抽样调查发现,哮喘的患病率约为0.5%～4%,哮喘病患者至少在2500万人以上。春暖花开时节,飞扬的花粉极易诱发哮喘发生。老年人春季哮喘高发主要与 According to relevant statistics, at present, there are more than 100 million people in the world suffering from asthma and the incidence has been increasing year by year. In particular, some developed countries such as the United States, Britain and New Zealand have an incidence rate of over 10%. In recent years, several large cities in our sample survey found that the prevalence of asthma is about 0.5% to 4%, asthma patients at least 25 million people. Spring season, flying pollen can easily induce asthma. The elderly are mainly associated with high asthma in spring