There are 4 blood types:
A
AB
B
O
However, there are over 20 blood groups with the most common being the ABO and Rh.
You can learn more here:
http://nobelprize.org/educational_games/medicine/landsteiner/readmore.html
2006-07-17 19:46:34
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answer #1
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answered by ilse72 7
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give ilse the best answer!!! neither training as a rn or phlebotomy certification taught me that, but a quick google search proves she's right! wow!!! (priniting out pages to take to the floor with me tomorrow....)
2006-07-18 03:23:32
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answer #2
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answered by Anonymous
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A+, B+, AB+, O+ and then A-, B-, AB-, O- AB univerical rep/ and O is the uni donnor...so 8 total
2006-07-18 02:43:42
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answer #3
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answered by hannah 1
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three?
2006-07-18 02:44:00
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answer #4
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answered by Else 2
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