Cutoff Verification
Rubella IgG EIA utilizes the CDC Low-titer Anti-Rubella Human Reference Serum, CDC Biological Standard, to verify the Rubella IgG EIA assay cutoff.
This standard, which contains 21.0 IU/mL of Rubella IgG antibody, is diluted 1:2 in the test set diluent, and assayed during the quality control testing of
each production lot of Rubella IgG EIA. The expected value for the 1:2 dilution of the CDC standard is 10 to 15 IU/mL, which is in agreement with the
CDC immunity cutoff reference level. For example: the Rubella IgG EIA lot which was used to obtain the majority of the data presented in the
Performance Characteristics section of this package insert, gave a value of 11.2 IU/mL for the 1:2 of the CDC standard, during quality control testing.