EB病毒(EBV)原发感染后,病毒可在宿主体内终身存在。到20岁时,90%以上的人血清EBV阳性。但是,某些个体很久不发生血清阳转。这种长期的血清EBV阴性现象可由两种假设来解释;①青少年比20岁以上的人更喜欢男女约会,并广泛地接吻(缺乏暴露假设);②EBV阳性与阴性个体存在着 After primary infection with Epstein-Barr virus (EBV), the virus can persist in the host. By the age of 20, more than 90% of human serum EBV-positive. However, some individuals do not have seroconversion for a long time. This long-term negative serum EBV phenomenon can be explained by two hypotheses; (1) teens prefer to date men and women more than 20 years of age, and kiss extensively (lack of exposure to hypotheses); (2) EBV-positive and -negative individuals have