“减毒”用英语怎么说

目的了解冻干风疹减毒活疫苗的免疫持久性.Objective To study the immunity duration of attenuated live rubella vaccine.预防接种流感活疫苗或减毒活疫苗.Influenza vaccination of live attenuated live vaccine or vaccines.乙脑减毒活疫苗对1～6岁儿童的保护率为95 98%,95%可信限为7203%～994...