人群免疫 meaning in Chinese

community immunity
herd immunity

Effect of booster immunization of live attenuated hepatitis a vaccine
甲型肝炎灭活疫苗及减毒活疫苗对不同人群免疫效果的研究
Analysis on antigenicity and hi antibody level of influenza virus in zhejiang province
浙江省近年来流感病毒株的抗原性及人群免疫状况分析
Study on the relationship between immune competence and nutrients intake in the pre - elderly population
老年前期人群免疫功能与膳食营养素摄入关系研究