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Double red is a procedure where your blood goes into a centrifuge, the red cells are removed and the rest is pumped right back where it came from! It lets you give less often and, though it takes longer is supposed to be more comfortable since a smaller needle is used and you leave more hydrated. It's a strange sensation when the plasma that's been sitting in a bag (thus cooling off) gets pumped back in. It's feels like you have an internal air conditioner. I used to do this, but found I prefer the regular whole blood donation.
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Lee
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