Impaired haemophilus influenzae type b transplacental antibody transmission and declining antibody avidity through the first year of life represent potential vulnerabilities for HIV-exposed but -uninfected infants

流感嗜血杆菌b型抗体经胎盘传递受损以及生命第一年抗体亲和力下降，对暴露于HIV但未感染的婴儿而言，是潜在的脆弱因素。