The research I need to do is when there's a bad blood transfusion; and given there is a bad blood transfusion, why would the recipient's blood cause more of a problem than the donor's.
So I cannot base any answer on the bad transfusion not happening in the first place; that part is a given.
On a side note, from what I've been researching, while O is the universal donor, O still have A and B anti-bodies which if the recipient has type A or B blood, there might be a small amount of agglutination based on volume. It will not be complete cross linking as the antigens matter more (from what I've read), but there might be some.
What I've not been able to determine is that if you already have a bad blood transfusion (the given), why would the recipients blood matter more than the donor in terms of the threat.
, if I understand your answer, then it is a volume issue; one of the things I've been thinking.
, I might have to presume this is whole blood which includes plasma.