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Two commercially available rapid screening tests, Rubacell (Abbott Laboratories; passive hemagglutination) and FIAX (International Diagnostic Technology; indirect immunofluorescence) were compared with a standard hemagglutination inhibition assay for detection of immunity to rubella infection. In tests of approximately 300 sera, both rapid assays were specific and sensitive and showed a high predictive value of a positive result. Within-run reproducibility studies were excellent for both tests; however, Rubacell was superior to FIAX with respect to time-cost analysis.
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Brody et al. (1979) studied this question.
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