Can the second blood group be transfused to people with which or which groups?

With 4 groups, and 2 of course.
It’s all very easy to remember.
People with blood group 1 (or, so to speak, universal donors) take only the first blood group and no more, people with blood group 2 take 1 and 2, people with blood group 3 take 1 and 3, and people with blood group 4 take all groups blood.



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