Figure 2: Experimental studies of active specific immunotherapy in the guinea pig tumor model system: Percentage survival as a function of time after challenge with 106 L10 cells i.v. Vaccinations 1+2=107 BCG+107 L10; 3: L10 alone. () control; (○) 3 vaccinatgions, days 1, 7, 14; (Δ) 3 vaccinations, days 4, 10, 17; () 3 vaccinations, days 7, 14, 21 () 3 vaccinations, days 10, 17, 24.