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Env binding antibodies detected by ELISA in sera from vaccinated and control cats. Solid squares, geometric mean titers of antibody against the indicated antigens; open squares, geometric mean titers of antibody against gp derived from uninfected substrate cells (MBM cells for FIV-M2 and CrFK cells for FIV-P). Bars represent 95% confidence limits. For squares without bars, the limits lie within the symbols. The numbers of sera tested in each group are shown in parentheses.
