Do you know which blood type you are talking about?
The universal blood donor is O negative. In clinics, in emergency cases when the patient's blood type is unknown, doctors use this type of blood for transfusion.
Blood type O negative saves the lives of many patients, for example, a person diagnosed with cancer, a person who has been in an accident, a small person during critical surgery, and so on.
This type of blood is found in 7% of the world's population.
O negative does not have an antigen, therefore, when injected into the body of a patient with another blood type, it will not cause an immune reaction.
For your information, a person with an O negative blood type needs exactly this type of blood for transfusion.
https://www.redcrossblood.org/local-homepage/news/article/what-is-a-universal-blood-type-0.html
