He felt it necessary to explain properly anyway. Otherwise, in case of an accident, neither the hospital nor himself could endure the consequences.
"What we mean by relative here is primarily a relative with a genetic link, such as parents and their offspring. Because entire sections of parents' genes are generally inherited on the chromosomes, their haplotype genes are usually the same. If there is a donor or recipient relationship between them, the chances of getting TA-GVHD significantly increase. This disease has an incidence of 0.1% to 1%, the closer the blood relationship, the higher the incidence, especially for first-degree relatives, parents and their children, the incidence is 10 to 20 times higher."
