Blood doesn’t just come in types A, B, AB, and O. In fact, let’s get all the way into the
weeds: Scientists have discovered over 300 proteins that contribute to blood type. The AB+ on your blood donor card? Yeah, that’s a massive oversimplification.
So blood is very specific to an individual.
source: [https://www.wired.com/2016/03/beyond-blood-type-genomics-can-show-youre-really-made/](https://www.wired.com/2016/03/beyond-blood-type-genomics-can-show-youre-really-made/)
Oh and did anyone mention the increased risk of liver cancer and non-Hodgkin lymphoma among blood transfusion recipients?
source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5391695/
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