<Li> Blood group O ( or blood group zero in some countries ) individuals do not have either A or B antigens on the surface of their RBCs , and their blood serum contains IgM anti-A and anti-B antibodies . Therefore , a group O individual can receive blood only from a group O individual , but can donate blood to individuals of any ABO blood group ( i.e. , A , B , O or AB ) . If a patient in a hospital situation needs a blood transfusion in an emergency , and if the time taken to process the recipient 's blood would cause a detrimental delay , O negative blood can be issued . Because it is compatible with anyone , O negative blood is often overused and consequently is always in short supply . According to the American Association of Blood Banks and the British Chief Medical Officer 's National Blood Transfusion Committee , the use of group O RhD negative red cells should be restricted to persons with O negative blood , women who might be pregnant , and emergency cases in which blood - group testing is genuinely impracticable . </Li>
<Li> Blood group O ( or blood group zero in some countries ) individuals do not have either A or B antigens on the surface of their RBCs , and their blood serum contains IgM anti-A and anti-B antibodies . Therefore , a group O individual can receive blood only from a group O individual , but can donate blood to individuals of any ABO blood group ( i.e. , A , B , O or AB ) . If a patient in a hospital situation needs a blood transfusion in an emergency , and if the time taken to process the recipient 's blood would cause a detrimental delay , O negative blood can be issued . Because it is compatible with anyone , O negative blood is often overused and consequently is always in short supply . According to the American Association of Blood Banks and the British Chief Medical Officer 's National Blood Transfusion Committee , the use of group O RhD negative red cells should be restricted to persons with O negative blood , women who might be pregnant , and emergency cases in which blood - group testing is genuinely impracticable . </Li>
why blood group o is called universal donor
why blood group o is called universal donor
can donate blood to individuals of any ABO blood group
can donate blood to individuals of any ABO blood group