尽管用现行的方法制备疫苗已获得许多成功,但并非没有问题.通常用含有整个或部分病原体的疫苗作预防接种,但这一方法有其局限性,因为接种后偶见有害的副作用,此外,用人工方法培养病原体产量较低.现 Although many of the successes achieved by the current methods of vaccine production have been achieved without problems, vaccines containing whole or partial pathogens are often used as vaccinations, but this method has its limitations because of the occasional unpleasant side effects after vaccination and, in addition, With artificial methods to cultivate pathogens lower yield