EB virus antibody and infectious mononucleosis in a boarding school for boys.

A study of EB virus antibody was undertaken in a boarding school for boys between 11 and 18 years of age; 35% of boys had EBV antibody when first sampled and a small number acquired antibody each year. Some of these boys had had no recorded illness during the period before the first positive sample and some developed classic infectious mononucleosis which was accompainied by a positive heterophil antibody test and detection of EB virus specific IgM. In a school of 800 boys there were 13 cases of infectious mononucleosis in four years.