Abstract
A seroepidemiologic time-comparison study was conducted to evaluate changes in IgG antibody to varicella-zoster virus (VZV) and to determine VZV prevalence in Japan with randomly collected serum samples from two healthy Japanese populations: 1973 (n = 670) vs. 1984 (n = 677). Enzyme-linked immunosorbent assay (ELISA) was found to be superior to the immune adherence hemagglutination test (IAHA) especially for detecting seropositivity in adults. Serologic results showed essentially no significant difference between the 1973 and the 1984 age-specific prevalences; with the exception of a slightly lower prevalence in the 5-year-old age group in 1973 than that in 1984. In general, the age-specific prevalence was lowest in the 1-year-old group (mean 11%) and increased in a linear fashion until age 9 (mean 82.9%); prevalence continued to increase slowly after age 9 and plateaued at 100% for ages greater than or equal to 25-29.
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