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'''Blood donation''' is the process of giving [[blood]] to be used for medical purposes, including [[blood transfusion]]s. Some blood donors are able to give donate blood [[platelet]]s by [[apheresis]]; the process is lengthier (around two hours per donation) and can be undertaken every four weeks, rather than three times a year for regular donation.

'''Blood donation''' is the process of giving [[blood]] to be used for medical purposes, including [[blood transfusion]]s. Some blood donors are able to give blood [[platelet]]s by [[apheresis]]; the process is lengthier (around two hours per donation) but can be undertaken every four weeks, rather than around three times a year for regular donation.

Some religious groups such as [[Jehovah's Witnesses]] do not agree with the donation or receipt of blood for conscientious reasons.

Some religious groups such as [[Jehovah's Witnesses]] do not agree with the donation or receipt of blood for conscientious reasons.