The success of any given vaccine depends on so-called herd immunity, in which a high rate of immunization in a population helps to protect those individuals who are not immune.

任何特定疫苗的成功都依赖于所谓的免疫屏障，即通过高比率的免疫人群来保护不免疫的个体。

youdao

The GACVS acknowledges that supposed "immune overload" as a result of infant immunization is a parental and societal concern that may limit confidence in and thus affect immunization programmes.

GACVS承认，所谓“免疫超负荷”(immune overload)作为婴儿免疫接种的结果，是由于父母和社会对其高度关注所致，可能会因此降低对免疫接种规划的信赖，进而影响免疫规划的开展。

youdao

This article summarizes the advantages, candidate antigens, combined immunization, immune mechanisms of DNA vaccine, and illustrates the problems and prospects of future researches on DNA vaccine.

该文概述了日本血吸虫DNA疫苗的优点、候选抗原、联合免疫、免疫机制及DNA疫苗存在的问题和展望。

youdao