[ad#info-link-tag-top] [ad#post] Individuals with blood type O have red blood cells without antigen, but produce antibodies against antigens A and B. Thus, people with blood type O-negative can donate blood to the person with any ABO blood group and called the universal donor. However, people with blood type O-negative can only receive blood from another O-negative. In general, blood type O is most common in the...