The Epstein-Barr virus (EBV)-specific antibody profile of 101 Greenland Eskimo children was determined. The proportion of children with serological evidence of recent or past primary EBV infections rose from 22% at 6 months of age to 79% at 24 months of age. All but 2 of 49 children more than 4 years of age proved seropositive. The geometric mean titre (GMT) of antibodies to the viral capsid antigen (VCA) was highest during the first 3 years of life and declined sharply to a lower, nearly constant level in older children. The GMT of antibodies to the nuclear antigen (EBNA), rose slowly during the first 4 years of life to its persistent level. None of the children had a history of illnesses comparable to infectious mononucleosis. The results have shown that in this population with an enhanced risk of nasopharyngeal carcinoma, primary EBV infection occurs at a very early age.
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