Some words that are useful in this discussion, a 'host'. A host is the organism that you're interested in defending and it could be you or me or some typical person.

讨论中会用到一些词,宿主 宿主是,你对其免疫反应感兴趣的生物体,可以是你我,或者其他人

耶鲁公开课 - 生物医学工程探索课程节选