There are eight main blood types but some are rarer than others. These are the ABO and the Rh-positive/Rh-negative blood group systems. Though there are at least 33 blood group systems, only two are widely used. Your blood also contains antigens, which are proteins and sugars that sit on red blood cells and give blood its type. It also contains white blood cells, which help fight infection and platelets, which help your blood clot.īut that’s not where it ends. The aim is to raise global awareness of the need for safe blood.”Įvery drop of blood contains red blood cells, which carries oxygen throughout the body.

I myself being O negative, was always curious to know about all the information related to rare blood groups.ĭr Asha Ojha, said, “World blood donor day takes place on June 14 each year. But those are just the most common categories – what about the rest? What about people with ‘rare’ blood who don’t fit into any of these categories, thanks to uncommon combinations (or absences) of certain antigens? New Delhi: You may already know your blood type: whether it’s A, B, AB or O, and whether it’s positive or negative.

What is the rarest blood type