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Do people still carry a card to say they are rhesus negative o blood type?

April 26, 2017blood card carry negative people rhesus type

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Do people still carry a card to say they are rhesus negative o blood type?

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If you donate blood, the Red Cross will give you a card to show your blood-type and how much you have donated. However the hospital will not use this card to determine what kind of blood to give you if you need a transfusion, they will either give you O Negative Blood or test yours to see what your type is and if the blood they are giving you will make you sick.