[Blood Types]

Blood Groups

All human blood may look similar, but you can’t donate to anyone and you can’t receive blood from anyone. Different blood types need to be matched correctly. Although all blood is made of the same basic elements, not all blood is alike. In fact, there are eight different common blood types, which are determined by the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body. Since some antigens can trigger a patient’s immune system to attack the transfused blood, safe blood transfusions depend on careful blood typing and cross-matching.

The ABO Blood Group System

There are four major blood groups determined by the presence or absence of two antigens – A and B – on the surface of red blood cells:

Group A– has only the A antigen on red cells (and B antibody in the plasma).

Group B– has only the B antigen on red cells (and A antibody in the plasma).

Group AB– has both A and B antigens on red cells (but neither A nor B antibody in the plasma).

Group O– has neither A nor B antigens on red cells (but both A and B antibody are in the plasma).

Bombay Group – In group ‘O’ individuals absence of ‘H’ antigen.

Varma union blood bank 2021


  • Voluntary Blood Centre with service objective.
  • Accepts blood from eligible VOLUNTARY BLOOD DONORS only.
  • Provides the highest level of health safeguard to Donors & Recipients.
  • Provides safe, good quality and appropriate blood or blood components to patients. Serve the Society at large with no discrimination of caste, creed, religion, language, poor, rich, rural and Urban.
  • Anyone who comes seeking blood shall not return empty-handed.
  • Continuous improvement of quality of service and product.
  • Creating awareness about the need for blood donation as health care services.
  • Provide service with a smile to mitigate the suffering faced by the patient care-taker.


  • Well-equipped laboratories.
  • Blood components Separation Unit.
  • Single Donor Platelets (Apheresis) unit.
  • Plasmapheresis
  • 24 X 7 Service