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Type O- is actually the theoretical universal donor; type O+ cannot donate to everyone.

Blood has two main types of protein markers; an ABO group, and an Rh factor. There are also smaller, less important factors, but these two are what donors need to have a generally successful blood transfusion.

ABO group proteins show up as A or B, therefore creating blood that has both (AB) and blood that has neither (O) as well as type A and type B. The Rh factor then either shows up or doesn't, so if someone doesn't have the factor, their blood type is -(negative), and if they do, then their blood is +(positive). If a person with O- got any other type of blood, then the blood would see the proteins on the blood as foreign invaders and attack it, whereas AB+ can receive from anyone without disease.

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Related Questions

Which type is the universal recipient?

There is no blood group that is considered as universal recipient. Blood type O individuals are considered to be universal donors.


The blood type that is considered the universal plasma donor is?

Type O


Are people with blood type O can be considered blood type universal recipient?

Yes, blood type "O" is considered universal recipient. Blood type "AB" can not donate too someone with blood type O can donate blood too a person with blood type O.


Which blood type is theoretically considered the universal donor?

The blood type that is theoretically considered the universal donor is type O. Type O blood does not have any antigens, therefore it is compatible with any blood type.


Is blood type o the universal donor?

Yes, type O blood is considered universal because they can donate to all other blood types. It is also the most common blood type. They only can receive blood from another type O person.


What blood type is considered the universal donor?

Type O is the universal doner. It is because the type of antigen on red blood cell is none and the antybody in blood plasma is anti- A and anti-B.It can donate to A,B,AB and O.


What blood type can donate blood to any blood type?

Blood type O- is the one that can be giving to anybody


Is O blood type universal?

Type O blood is considered to be the universal blood type. This is because it does not have either A or B antigens on the red cells. It does however contain the antibodies for each one in the plasma.


Is there such a thing as a universal blood type ?

Some time ago, blood type O negative was considered to be a universal blood type. However, even O negative can contain antibodies that can be harmful to the receiver.


Do you know what your blood type is?

My blood type is O negative. I have blood type that is considered a universal donor. My parents are type AB and type O, so it was not very surprising to have type O.


If I have type O blood would I be a universal Donor, or recipient?

People who have type O blood are universal donors, but not universal recipients. They can donate to anyone, but can only receive blood from another type O person. This is why type O blood is always in great demand by blood banks.


Why is type A blood considered the universal donor?

No, AB is a universal recipient, and can only be given to other people with type AB blood. O is a universal donor but can only receive O, A can only receive A and can only be given to A and AB, and B can only receive B and be given to B and AB.