[Serum antibodies to rubella virus in healthy individuals with indirect immunofluorescent method].

To investigate sensitivity to rubella virus (RV) in healthy individuals, we examined levels of antibodies to RV in sera by an indirect immunofluorescence assay (IFA) and compared levels of antibodies by IFA with those by a hemagglutination inhibition (HI) assay. Of 114 healthy individuals, we detected antibodies to RV in serum specimens from 103 (90.3%) by IFA and in those from 109 (95.