疫苗按其在传染病防治中的作用可分为预防性疫苗和治疗性疫苗两大类.近十年来由于证实疫苗疗法能增强艾滋病患者对人类免疫缺陷病毒(HIV)的天然免疫力,疫苗疗法作为慢性传染病的治疗方法重又引起人们的兴趣.在抗生素时代,疫苗疗法仍具有实用价值.理由如下:①许多细菌或病毒等引起的疾病目前尚无有效药物;②疫苗可与药物起协同作用,促进疾病康复;③在几个月中注射几针疫苗,比每天用药方便;④疫苗副作用少. According to their role in the prevention and treatment of infectious diseases, vaccines can be divided into two categories: preventive vaccines and therapeutic vaccines. In the recent ten years, as vaccine vaccines have been shown to enhance the natural immunity of HIV-infected people against HIV, Vaccine therapy is still of practical value in the era of antibiotics for the following reasons: ① There are no effective drugs for the diseases caused by many bacteria or viruses; ② The vaccine can be synergized with the drugs Role in promoting the rehabilitation of the disease; ③ in a few months injections of several doses of vaccine, convenient than daily medication; ④ vaccine side effects.