Medical purposes in this case is manufactured blood products.
Directly transfused blood must be volunteer donations but concentrated clotting agents and such can be made from paid plasma. The assumption was that the process introduces more safeguards but the assumption is, or was, provaby wrong.
Technically speaking it is legal to use paid plasma for transfusion, it just needs to be marked as such, but it hardly ever happens in legitimate medical institutions.
Medical purposes in this case is manufactured blood products.
Directly transfused blood must be volunteer donations but concentrated clotting agents and such can be made from paid plasma. The assumption was that the process introduces more safeguards but the assumption is, or was, provaby wrong.
Technically speaking it is legal to use paid plasma for transfusion, it just needs to be marked as such, but it hardly ever happens in legitimate medical institutions.