the answer why qu cheng cannot donate his blood to wowo:

"Although all blood is tested, all blood donations have a very small chance that they may pass on an infection when the blood is given to others. Sometimes, because a child may react to blood from family members, the parents' blood may be less safe than regular blood for their child."
-This is from a credited study on Google, if you want more proof just Google it also.
i got it from here but yes it's pretty dangerous if wowo will receive his blood. since he just came from an accident and he is still a baby, complications related to blood is fatal.

don't they screen it first if the blood is compatible to be donated? (⊙…⊙ )doctors can't recklessly inject blood to a patient even if they're the same type.
but I do get your point. there might be some complications since he's still a baby and his immune system might still not be strong.

yes that's what im thinking too but i think it would cause them more time since it's pretty urgent or the doctors won't know theyre related lmao we really don't know about medical stuff. but one thing's for sure, no matter what happens next, qu cheng must not be the one who is giving blood to wowo

It’s because of transfusion-associated graft versus host disease (TA-GvHD). There’s a high mortality rate with no cure and it’s due to the donor’s T-cells in the blood attacking the recipient’s tissues and organs. The recipient’s immune system doesn’t respond if the donor is a direct relative because it doesn’t register the foreign t-cells as a foreign entity. So yes, Qu Cheng’s blood would literally kill Wo Wo.

oooooooooooooooooooooooooooooooooooooh ( ⊙…⊙ ) thanks for that!

so it will complicate things if the virus can't be detected. but it's a manga, let's hope that won't happen next chapter.

I see, I see.... I hope none of that applies though... it'd be bad if wo wo died. ╥﹏╥