Bone marrow matching hvg refers to host anti-graft response, while gvh refers to graft-versus-host response, which is an important indicator to determine whether bone marrow transplantation can be successful. 1. hvg: is the host anti-graft reaction, is what we usually call the rejection reaction, that is, the host-specific lymphocytes after recognizing the graft antigens, that is, rejection of the graft reaction. 2. gvh: is a graft-versus-host reaction, which is an immune response that occurs when specific lymphocytes present in the graft recognize certain antigens in the host, and which can lead to graft failure and can have serious consequences. Therefore, the hvg and gvh of the bone marrow match are important indicators of the success of a bone marrow transplant.