Microbiology Graft versus host disease is due to ? A Immunocompetent T cells in graft tissue B Immunocompetent T cells in host C Immunocompetent B cells in graft tissue D Immunocompetent B cells in host 💡 Explanation Graft versus host disease is due to ? ✓ Correct Answer: A. Immunocompetent T cells in graft tissue