Is o negative universal donar?

They must receive type O negative blood, which many hospitals store as universal donor blood.

Because there are no antigens present on te blood cells and so the recipient cannot launch an immune response against it no matter what antibodies they express.

O negative is the universal donor. ABO blood typing refers to the presence of A or B antigen on the red blood cell. O blood does not carry either antigen, so does not elicit an antibody response. The...

Yes. O negative blood is what is given in the emergency room if the patients blood type is unknown.

yes it may be because it may be donated to other blood types.