Compatibility.
Who can give to whom: red cells, plasma and platelets.
72 guides
Antigens and antibodies, the two words that explain blood
What antigens and antibodies really are, why your plasma attacks blood groups you lack, and how two words unlock every blood compatibility rule.
Blood group chart: who can give to whom, at a glance
The complete ABO/Rh compatibility table, red cells, plasma and who can receive from whom, on one page.
Blood typing, step by step, how your group is determined
How a lab finds your blood group: forward and reverse grouping, Rh and weak-D testing, repeat checks, and why a wrong label is a real emergency.
Can A+ donate blood to A+?
Yes, A+ red cells can be given to A+ patients. The compatibility science, what else A+ donors can do, and how the crossmatch confirms it.
Can A+ donate blood to A−?
No, A+ red cells cannot go to A− patients. Which groups A− can receive from, and what A+ donors can do instead.
Can A+ donate blood to AB+?
Yes, A+ red cells can be given to AB+ patients. The compatibility science, what else A+ donors can do, and how the crossmatch confirms it.
Can A+ donate blood to AB−?
No, A+ red cells cannot go to AB− patients. Which groups AB− can receive from, and what A+ donors can do instead.
Can A+ donate blood to B+?
No, A+ red cells cannot go to B+ patients. Which groups B+ can receive from, and what A+ donors can do instead.
Can A+ donate blood to B−?
No, A+ red cells cannot go to B− patients. Which groups B− can receive from, and what A+ donors can do instead.
Can A+ donate blood to O+?
No, A+ red cells cannot go to O+ patients. Which groups O+ can receive from, and what A+ donors can do instead.
Can A+ donate blood to O−?
No, A+ red cells cannot go to O− patients. Which groups O− can receive from, and what A+ donors can do instead.
Can A− donate blood to A+?
Yes, A− red cells can be given to A+ patients. The compatibility science, what else A− donors can do, and how the crossmatch confirms it.
Can A− donate blood to A−?
Yes, A− red cells can be given to A− patients. The compatibility science, what else A− donors can do, and how the crossmatch confirms it.
Can A− donate blood to AB+?
Yes, A− red cells can be given to AB+ patients. The compatibility science, what else A− donors can do, and how the crossmatch confirms it.
Can A− donate blood to AB−?
Yes, A− red cells can be given to AB− patients. The compatibility science, what else A− donors can do, and how the crossmatch confirms it.
Can A− donate blood to B+?
No, A− red cells cannot go to B+ patients. Which groups B+ can receive from, and what A− donors can do instead.
Can A− donate blood to B−?
No, A− red cells cannot go to B− patients. Which groups B− can receive from, and what A− donors can do instead.
Can A− donate blood to O+?
No, A− red cells cannot go to O+ patients. Which groups O+ can receive from, and what A− donors can do instead.
Can A− donate blood to O−?
No, A− red cells cannot go to O− patients. Which groups O− can receive from, and what A− donors can do instead.
Can AB+ donate blood to A+?
No, AB+ red cells cannot go to A+ patients. Which groups A+ can receive from, and what AB+ donors can do instead.
Can AB+ donate blood to A−?
No, AB+ red cells cannot go to A− patients. Which groups A− can receive from, and what AB+ donors can do instead.
Can AB+ donate blood to AB+?
Yes, AB+ red cells can be given to AB+ patients. The compatibility science, what else AB+ donors can do, and how the crossmatch confirms it.
Can AB+ donate blood to AB−?
No, AB+ red cells cannot go to AB− patients. Which groups AB− can receive from, and what AB+ donors can do instead.
Can AB+ donate blood to B+?
No, AB+ red cells cannot go to B+ patients. Which groups B+ can receive from, and what AB+ donors can do instead.
Can AB+ donate blood to B−?
No, AB+ red cells cannot go to B− patients. Which groups B− can receive from, and what AB+ donors can do instead.
Can AB+ donate blood to O+?
No, AB+ red cells cannot go to O+ patients. Which groups O+ can receive from, and what AB+ donors can do instead.
Can AB+ donate blood to O−?
No, AB+ red cells cannot go to O− patients. Which groups O− can receive from, and what AB+ donors can do instead.
Can AB− donate blood to A+?
No, AB− red cells cannot go to A+ patients. Which groups A+ can receive from, and what AB− donors can do instead.
Can AB− donate blood to A−?
No, AB− red cells cannot go to A− patients. Which groups A− can receive from, and what AB− donors can do instead.
Can AB− donate blood to AB+?
Yes, AB− red cells can be given to AB+ patients. The compatibility science, what else AB− donors can do, and how the crossmatch confirms it.
Can AB− donate blood to AB−?
Yes, AB− red cells can be given to AB− patients. The compatibility science, what else AB− donors can do, and how the crossmatch confirms it.
Can AB− donate blood to B+?
No, AB− red cells cannot go to B+ patients. Which groups B+ can receive from, and what AB− donors can do instead.
Can AB− donate blood to B−?
No, AB− red cells cannot go to B− patients. Which groups B− can receive from, and what AB− donors can do instead.
Can AB− donate blood to O+?
No, AB− red cells cannot go to O+ patients. Which groups O+ can receive from, and what AB− donors can do instead.
Can AB− donate blood to O−?
No, AB− red cells cannot go to O− patients. Which groups O− can receive from, and what AB− donors can do instead.
Can B+ donate blood to A+?
No, B+ red cells cannot go to A+ patients. Which groups A+ can receive from, and what B+ donors can do instead.
Can B+ donate blood to A−?
No, B+ red cells cannot go to A− patients. Which groups A− can receive from, and what B+ donors can do instead.
Can B+ donate blood to AB+?
Yes, B+ red cells can be given to AB+ patients. The compatibility science, what else B+ donors can do, and how the crossmatch confirms it.
Can B+ donate blood to AB−?
No, B+ red cells cannot go to AB− patients. Which groups AB− can receive from, and what B+ donors can do instead.
Can B+ donate blood to B+?
Yes, B+ red cells can be given to B+ patients. The compatibility science, what else B+ donors can do, and how the crossmatch confirms it.
Can B+ donate blood to B−?
No, B+ red cells cannot go to B− patients. Which groups B− can receive from, and what B+ donors can do instead.
Can B+ donate blood to O+?
No, B+ red cells cannot go to O+ patients. Which groups O+ can receive from, and what B+ donors can do instead.
Can B+ donate blood to O−?
No, B+ red cells cannot go to O− patients. Which groups O− can receive from, and what B+ donors can do instead.
Can B− donate blood to A+?
No, B− red cells cannot go to A+ patients. Which groups A+ can receive from, and what B− donors can do instead.
Can B− donate blood to A−?
No, B− red cells cannot go to A− patients. Which groups A− can receive from, and what B− donors can do instead.
Can B− donate blood to AB+?
Yes, B− red cells can be given to AB+ patients. The compatibility science, what else B− donors can do, and how the crossmatch confirms it.
Can B− donate blood to AB−?
Yes, B− red cells can be given to AB− patients. The compatibility science, what else B− donors can do, and how the crossmatch confirms it.
Can B− donate blood to B+?
Yes, B− red cells can be given to B+ patients. The compatibility science, what else B− donors can do, and how the crossmatch confirms it.
Can B− donate blood to B−?
Yes, B− red cells can be given to B− patients. The compatibility science, what else B− donors can do, and how the crossmatch confirms it.
Can B− donate blood to O+?
No, B− red cells cannot go to O+ patients. Which groups O+ can receive from, and what B− donors can do instead.
Can B− donate blood to O−?
No, B− red cells cannot go to O− patients. Which groups O− can receive from, and what B− donors can do instead.
Can O+ donate blood to A+?
Yes, O+ red cells can be given to A+ patients. The compatibility science, what else O+ donors can do, and how the crossmatch confirms it.
Can O+ donate blood to A−?
No, O+ red cells cannot go to A− patients. Which groups A− can receive from, and what O+ donors can do instead.
Can O+ donate blood to AB+?
Yes, O+ red cells can be given to AB+ patients. The compatibility science, what else O+ donors can do, and how the crossmatch confirms it.
Can O+ donate blood to AB−?
No, O+ red cells cannot go to AB− patients. Which groups AB− can receive from, and what O+ donors can do instead.
Can O+ donate blood to B+?
Yes, O+ red cells can be given to B+ patients. The compatibility science, what else O+ donors can do, and how the crossmatch confirms it.
Can O+ donate blood to B−?
No, O+ red cells cannot go to B− patients. Which groups B− can receive from, and what O+ donors can do instead.
Can O+ donate blood to O+?
Yes, O+ red cells can be given to O+ patients. The compatibility science, what else O+ donors can do, and how the crossmatch confirms it.
Can O+ donate blood to O−?
No, O+ red cells cannot go to O− patients. Which groups O− can receive from, and what O+ donors can do instead.
Can O− donate blood to A+?
Yes, O− red cells can be given to A+ patients. The compatibility science, what else O− donors can do, and how the crossmatch confirms it.
Can O− donate blood to A−?
Yes, O− red cells can be given to A− patients. The compatibility science, what else O− donors can do, and how the crossmatch confirms it.
Can O− donate blood to AB+?
Yes, O− red cells can be given to AB+ patients. The compatibility science, what else O− donors can do, and how the crossmatch confirms it.
Can O− donate blood to AB−?
Yes, O− red cells can be given to AB− patients. The compatibility science, what else O− donors can do, and how the crossmatch confirms it.
Can O− donate blood to B+?
Yes, O− red cells can be given to B+ patients. The compatibility science, what else O− donors can do, and how the crossmatch confirms it.
Can O− donate blood to B−?
Yes, O− red cells can be given to B− patients. The compatibility science, what else O− donors can do, and how the crossmatch confirms it.
Can O− donate blood to O+?
Yes, O− red cells can be given to O+ patients. The compatibility science, what else O− donors can do, and how the crossmatch confirms it.
Can O− donate blood to O−?
Yes, O− red cells can be given to O− patients. The compatibility science, what else O− donors can do, and how the crossmatch confirms it.
Emergency blood, why teams don't wait
Why unknown-group trauma patients get O negative blood first, how massive transfusion protocols work, and why the lab types while O− is running.
How blood compatibility actually works
Why blood types can't mix, what the antigens and antibodies are doing, and why the crossmatch (not the chart) gives the final word. Plain language.
Red cells vs plasma, the compatibility flip that surprises
AB is the universal red-cell recipient but the universal plasma donor. O is the opposite. Why one donation carries two opposite compatibility rules.
The crossmatch, the final check before any transfusion
What a crossmatch test is, major versus minor, the computer crossmatch, type and screen, how long it takes, and what incompatible results mean.
What happens in an incompatible transfusion, and why it's
The science of a transfusion reaction, the bedside warning signs, the stop-first protocol, and the layered checks that make mismatches rare.