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How many blood types are there?

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Eight;

A positive
A negative
B positive
B negative
AB positive
AB negative
O positive
O negative

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How do I tell what blood type I am?
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KatieTerror
You cant without a blood test. Or if you know both of your parents blood types that could help
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I think 4 or 5

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8. ^

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KatieTerror

8 in all, and they are as follows
O+ A+ B+ AB+ O- A- B- AB-

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