Rabies virus-specific serum antibody (IgG) response of mice immunized i.p. with CPDrg24. Serum antibody responses were measured by ELISA on plates coated with ERA strain rabies virus. Bars represent mean values obtained using preimmune and sera after each inoculation of antigen. A serum dilution of 1:160 was used. CPDrg24–1, -2, and -3 indicate the serum antibody response observed after the first, second, and third immunizations, respectively. A/TMV-1, -2, and -3 represent rabies-specific serum antibody responses from control-immunized mice (AIMV plus TMV).