seropositive
adjective medical specialized uk/ˌsɪə.rəʊˈpɒz.ə.tɪv/ us/ˌsɪr.oʊˈpɑː.zə.t̬ɪv/
血清反应阳性的
showing a positive result of a blood test for a particular antibody (= a substance in the blood that fights a disease)
patients who are seropositive for HIV antibodies HIV抗体呈阳性的患者