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Effect of αCD40 on concomitant immunity. a, b Balb/c mice were injected s.c. with 1 × 106 MethA cells in the right side of abdomen (day −9). Rat IgG (a) or αCD40 (b) at the dose of 0.5 mg per mouse was injected i.p. on day −5 and −1. On day 0, these and naïve control mice (c) were injected s.c. with 5 × 105 MethA cells in the left side of abdomen. Individual tumor volumes for the tumors on the left side of the abdomen for 4 (a, b) or 5 (c) mice per group are shown
