Post-transplantation research focuses on the study of patients who have undergone solid organ or bone marrow transplantation. This field involves investigating the long-term outcomes and complications of transplantation, including organ rejection, infection, graft-versus-host disease, and the effects of immunosuppressive medications. Researchers in this area also examine the impact of transplantation on quality of life, mental health, and overall well-being of transplant recipients. Additionally, studies in post-transplantation research aim to improve transplant outcomes through advances in surgical techniques, donor matching, and post-operative care protocols.