20世纪 70～ 80年代威胁人民健康的主要疾病为细菌感染性疾病、哮喘与高血压等心血管病。 80年代以后由于世界各国工业化进程的加快和国民生活水平的普遍提高 ,高血脂、糖尿病及抑郁症等精神疾病逐渐成为主要疾病 ,而细菌感染症已下降为次要疾病。据国外医药行业协会调查统计 , The main diseases threatening people’s health in the 1970s and 1980s are bacterial diseases such as infectious diseases, asthma and hypertension. Since the 1980s, due to the acceleration of industrialization in various countries in the world and the general improvement of the living standards of the Chinese people, mental illnesses such as hyperlipidemia, diabetes and depression have gradually become the major diseases and the bacterial infections have dropped to secondary diseases. According to foreign pharmaceutical industry associations survey statistics,