There was something different about His body and blood. I believe He never got sick. When the soldier at the cross speared His side blood AND water flowed. Who of us, aside from pregnant women, have blood and water inside? We all know His blood was spiritually different, but it was physically different as well. I believe He had human blood, but it was also Devine. It was not like the blood of His physical siblings.
Normally a baby starts out with a seed and a sperm, and makes its own blood once it developes bones and bone marrow. The DNA in the blood (and elsewhere) comes from both parents. If one parent has type A blood, and the other parent has type B blood, the child will have type AB blood. But if one parent has type A and the other type O, the child will be type A because it dominates over type O. But Christ physically had a type that no one else ever had or will have.
I believe it was both human and divine, but that the divine blood dominated over the human blood powerfully. But both come from God. Just as Jesus suddenly appeared in a locked room after His death, I believe He appeared as a seed inside Mary. Christ can just appear, and He can float up to the sky, there are so many ways He could have escaped the cross, but He died and shed His blood to set us free. How true the saying: Freedom isn't free.