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疫苗可诱发长期持久的免疫力,用于预防和控制传染病。某些弱毒疫苗获得高度成功,可能由于产生和不断补充高水平的记忆细胞,以形成抗体分泌细胞。某些疾病(如AIDS)是更大的难题,需要发挥所有分子生物学家和免疫学家的专长来设计一种可以控制该病的疫苗。目前正在积极地探索增强或减弱激素作用的疫苗,作为控制哺乳动物生育力的一种实用方法。在这种情况下,所需作用要维持一定时间,可能为一年以内。这些要求说明进一步需要疫苗接种的控制释放系统。
Vaccines can induce long-lasting immunity for the prevention and control of infectious diseases. Some attenuated vaccines have been highly successful, probably due to the production and continual replenishment of high levels of memory cells to form antibody-secreting cells. Some diseases, such as AIDS, are even more difficult and require the expertise of all molecular biologists and immunologists to design a vaccine that will control the disease. Vaccines that enhance or attenuate hormones are being actively explored as a practical means of controlling mammalian fertility. In this case, the required effect to maintain a certain period of time, may be less than one year. These requirements document a controlled release system that requires further vaccination.