79, He actually has a daughter
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."