O-
O- blood donors — who can donate to O-?
Everything a family needs to know when a patient needs O negative blood in Pakistan.
O- can give red cells to
O- can receive plasma from
Finding a O- donor quickly
In the Blood Drop app, choose your city and O-. Switch on Include compatible groups so donors with only the same group also appear. Send a contact request with the hospital and units — donors decide privately, and only accepted donors share their number.
For very urgent needs, create an Emergency Request: every available, compatible donor in your city gets an alert.
This page is general information. The hospital or blood bank always does the final cross-match.
O- donors by city
Full compatibility chartFAQ
Frequently asked questions
Who can donate blood to a O- patient?
For red cells and whole blood, a O- patient can usually receive from O-. The hospital always cross-matches before transfusion.
Who can a O- donor give blood to?
O- red cells can usually be given to A+, A-, B+, B-, AB+, AB-, O+, O- patients.
How do I find a O- blood donor near me?
Open the free Blood Drop app, choose your city and O-, and turn on “Include compatible groups” to see more donors. Tap Request Contact — the donor’s number is shared only if they accept.
Free · Non-profit · Private
Find O- donors near you
Download Blood Drop free. Register as a donor in two minutes, or find a donor when your family needs one.