Donate blood: You won't be allowed to donate blood twice a month. Do not go to a different program and don't consider giving blood for a least three between donation.
Answered 5/18/2015
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Donation limit: For blood you have to allow time for your red blood cells to regenerate and in US 56 days are required between donations. For plasma is different and you may be able to donate plasma twice a week. Please check redcrossblood.org for clarification.
Answered 6/2/2015
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