Type O is said to be the original blood type that all the others mutated from. Type O is the universal donor group.

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We would be dead because one disease would cripple the human race

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Bloody Mary....lol

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O- is the universal donor. They can give blood to anyone but can only receive o- blood.

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Obama care.

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AB-

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B Positive .. Only...<br />
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Regards

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