immunodeficiency
noun [ U ] medical specialized uk/ˌɪm.jə.nəʊ.dɪˈfɪʃ.ən.si/ us/ˌɪm.jə.noʊ.dɪˈfɪʃ.ən.si/
免疫缺陷
a condition in which a body is unable to produce enough antibodies to fight bacteria and viruses, often resulting in infection and disease