Most persons with rubella virus-specific immunoglobulin M (IgM)- or IgG-positive sera tested positive (98% [n = 178] and 99% [n = 221], respectively) using paired filter paper dried blood spot (DBS) samples, provided that DBS indeterminate results were called positive. For persons with IgM- or IgG-negative sera, 97% and 98%, respectively, were negative using DBS. Copyright © 2007, American Society for Microbiology. All Rights Reserved.
Helfand, R. F., Cabezas, C., Abernathy, E., Castillo-Solorzano, C., Ortiz, A. C., Sun, H., Osores, F., Oliveira, L., Whittembury, A., Charles, M., Andrus, J., & Icenogle, J. (2007). Dried blood spots versus sera for detection of rubella virus-specific immunoglobulin M (IgM) and IgG in samples collected during a rubella outbreak in Peru. Clinical and Vaccine Immunology, 1522-1525. https://doi.org/10.1128/CVI.00144-07