Diagram of the process of bone marrow or blood stem cell transplant. If the cells come from the patient, it is an autologous transplant; if the cells come from a matched donor, it is an allogenic transplant. Patients receiving allogenic transplants have a high risk of developing graft-versus-host disease.
Credit: Encyclopædia Britannica https://www.britannica.com/science/graft-versus-host-disease/media/240689/123191 (accessed 27 February 2019)
Read more at N. R. Gough, Gut microbes in graft-versus-host disease. BioSerendipity (1 March 2019)
https://www.bioserendipity.com/gut-microbes-in-graft-versus-host-disease/