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EBV-associated IM occurred at all age groups with a peak incidence at 2 to 4 years, corresponding to the rapid rise in the seroprevalence of EBV in early childhood in the Hong Kong Chinese. The majority of children presented with fever, tonsillopharyngitis, lymphadenopathy and hepatosplenomegaly, similar to the adult IM patients, and recovered without major complications. Marked lymphocytosis with the presence of atypical lymphocytes was a consistent hematologic finding in all age groups. The occurrence of hepatitis showed a clear association with advancing age (P = 0.003). The age-related increase in IM-associated hepatitis may reflect difference in the host immune response against EBV between the infants and older children.
Chan et al. (2003) studied this question.
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