Quantification of T cells and CD41 platelets. Quantification of CD3+ (A), CD4+ (B), and CD8+ (C) T cells and CD41+ platelets (D) infiltrating 129/sv allografts in C57BL/6 recipients immunized with vim/CFA (allo vim), hel/CFA (allo hel), or C57BL/6 isografts placed in vim/CFA (syn vim)-immunized mice at various times after transplantation. Results expressed as cells/hpf, mean ± SD (n = 4 mice/group). *P < 0.05 for differences between vim/CFA and hel/CFA controls.