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Examples of reference standard curves used to estimate specimen titers for the lysate, F, Ga, and Gb enzyme-linked immunoassays (EIAs). The curves were generated from serial two-fold dilutions of the BEI high titer RSV serum (BEI NR 4021). P is the mean absorbance for three wells against the respective antigen and N is the mean absorbance for three wells against the corresponding negative control antigen. RSV, respiratory syncytial virus
