How often can you donate blood?


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Donate You must wait a minimum of 56 days between whole blood donations. ChaCha

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You must wait--at least 8 weeks (whole blood) | 3 days (plateletpheresis) | 16 weeks (double red cell)--between donations.

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People in good health who weigh at least 110 pounds can donate a unit of blood as often as every eight weeks. ChaCha

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