Acute infection in the immunocompetent host is usually asymptomatic or produces only mild symptoms.[1] Between 40 and 90 percent of the adult general population has had prior infection with CM.

• 有免疫力的CM急性感染患者通常无症状或仅有轻微症状[1]。40-90%25的**以前已感染了CM。当一名感染了CM的患者就诊时，其临床表现往往与传染性单核细胞增多症相似。