ORLANDO, Fla. — A worldwide hunt for blood donations to help a girl with a rare kind of blood who is battling cancer has so far turned up no new matches.

OneBlood is leading the search for blood donations for two-year-old Zainab, a South Florida girl battling neuroblastoma.

Zainab's blood is missing a common antigen, Indian B, which most people have in their blood cells. Because of this, she can only get blood from people who are also missing the antigen.

OneBlood had 3 matches when they made public their international call for donors. The agency says it's so far tested at least 1,200 blood donations, but none of the blood is compatible for Zainab.

Here is how rare Zainab's blood is — OneBlood says people who are 100 percent of Indian, Pakistani or Iranian descent could statistically be possible donor matches for Zainab. Of people with that ancestry, less than 4 percent of those populations are missing in the Indian B antigen in their blood.

OneBlood says Zainab will need transfusions for the foreseeable future, so they are looking for at least 7 to 10 donors.

To qualify, potential donors must be:

  • Exclusively of Pakistani, Indian or Iranian descent, which means the donors birth parents also must have an exclusive ancestry
  • Must be blood type "O" or "A"

To see if you are compatible, go tothe OneBlood page created for Zainab.All donations must be coordinated in advance to ensure compatibility.

OneBlood runs blood donor centers across the Southeast.