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Some more non-settled science, courtesy of The Ottawa Hospital:
A large Canadian study has shown a link between blood donor characteristics and transfusion recipients' outcomes. This is the first study to suggest that red blood cell transfusions from young donors and from female donors may be associated with poorer survival in recipients.
Guess the old simple classification system of sorting all blood into a couple of types was too simple. Just because blood doesn't cause an instant life threatening reaction doesn't mean it is totally compatible.
And like any good science article, the conclusion is "more research is needed!"
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Researchers Find Association Between Donor Age, Female Sex and Transfusion Outcomes
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(Score: 5, Informative) by Dunbal on Wednesday July 13 2016, @01:19AM
Guess the old simple classification system of sorting all blood into a couple of types was too simple.
There are well over 50 different "types" of blood type. The ABO and Rh classifications are just the two most common ones because those will generally kill you within minutes if you get it wrong. That doesn't mean that having incompatible Lewis [wikipedia.org] or Diego [wikipedia.org] phenotypes won't end up killing you through a hemolytic anemia a few months down the road.
Remember when you were in high school and learned all that complicated math stuff? Unless you later chose math as a university major and an advanced degree, you thought that was as complicated as it gets - but in reality it gets far more involved than that. Well, same for biology, believe it or not.
(Score: 2) by driverless on Wednesday July 13 2016, @05:40AM
More like "Research finds that if you throw enough free variables into something, you can eventually find a sort-of straight line even if you have to use a double-antilog graph for it". There's a ton of similar research along these lines, e.g. that the teenage suicide rate tracks the number of Porsche's on the road, and other astounding correlations.
(Score: 4, Informative) by sjames on Wednesday July 13 2016, @08:25AM
That's exactly why donor blood is cross matched with the recipient except in emergency transfusions. The process can detect incompatibilities even of unknown types.
(Score: 2) by TheLink on Wednesday July 13 2016, @02:40PM
I've a suspicion that an uncle's blood type is XO+ ...
Not sure if his blood is flammable though. ;)
(Score: 0) by Anonymous Coward on Wednesday July 13 2016, @04:51PM
Remember when you were in high school and learned all that complicated math stuff?
No, because they don't teach math in high school. Instead, you play games of Jeopardy! on homework and tests. This is sometimes confused with math, but it's actually totally different.