Why do blood banks prefer blood type O donors?

Why do blood banks prefer blood type O donors?
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1 Answer

Answer :

Type O Blood is unique in that it can be used by anyone. If you have Type O blood, you are considered to be a "universal donor". No other blood type is like Type O in this way.
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Related questions

People with what blood type can give blood to anyone and are thus called universal donors? A. O- (Answer) B. O C. AB+ D. AB-

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Persons with which blood group are called universal donors? (1) AB (2) A (3) O (4) B

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Where is a chart of blood type donors and recipients?

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