ORLANDO, Fla. — OneBlood has found a fourth blood donor for a 2-year-old South Florida girl with a rare blood type.

Zainab is battling neuroblastoma, a rare type of cancer among children. Two matching donors for Zainab were found in the United Kingdom, while the other two were found in the U.S.

Her blood is missing common antigen Indian B, which most carry in their red blood cells. If Zainab gets a blood transfusion from someone with the antigen, her body will reject it.

People of Indian, Pakistani, or Iranian descent are statistically the only people to be a possible donor match for Zainab. Of these groups, less than 4 percent are also missing the Indian B antigen.

OneBlood says they are looking for three to six additional donors.

Potential donors must adhere to the following qualifications:

  • 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 find out if you are compatible, go to the OneBlood page created for Zainab.