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  • 10-11-2018
  • Biology
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Why was the physician able to use O negative blood before the results of the blood type tests were obtained?

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3076850
3076850 3076850
  • 10-11-2018

The tests are done before a blood transfusion. Blood typing is the first step. This test finds out whether you have blood type A, AB, B, or O. Your blood is also tested to find out whether your Rh type is negative or positive.

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