Donation basics
Universal Donor and Universal Recipient Explained
What O− and AB+ really mean.
O negative: the emergency group
O− red cells carry no A, B or Rh antigens, so any patient can receive them — trauma bays reach for O− when there's no time to type a patient.
AB positive: receive from anyone
AB+ patients have no anti-A or anti-B antibodies and are Rh-positive, so any group's red cells suit them — but AB+ donors are precious for plasma, where they're the universal givers.
Universal doesn't mean unlimited
Only ~1 in 15 Indians is O−; hospitals guard it fiercely. If you're O−, your registration matters more than most.
Frequently asked questions
Can O− patients receive O+?
No — O− patients can only receive O−, which is why the group runs short.
Is 'universal' checked anyway?
Yes — hospitals still cross-match every unit before transfusion.