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Comparison of rVNA titers (IU/mL) measured by the micro-neutralization test (microneut.) and RFFIT. Rabies virus neutralizing antibody was measure in individual serum samples by the micro-neutralization test (Microneut.) and RFFIT. Positive rVNA titers in IU/mL were plotted on a linear scale. The axis limits exclude four samples that had very high rVNA titers by both tests. The geometric mean titer was 3.4 IU/mL with the micro-neutralization test compared to 2.0 IU/mL with the RFFIT.
