type O blood

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type O blood

biology

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ABO blood group system

In ABO blood group system
…have type A, type B, type O, or type AB blood. The A, B, and O blood groups were first identified by Austrian immunologist Karl Landsteiner in 1901. See blood group.
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biological therapy

In therapeutics: Blood and blood cells
types A, B, and O were identified and cross-matching of the donor’s blood against that of the recipient to prove compatibility became possible. When blood with the A antigen (type A or AB) is given to someone with anti-A antibodies (type B or O blood), lysis of the red…
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