So you want to prevent transfusion associated transmission of infections. Good idea but you haven't mentioned which disease you want to target. Bacterial, viral, protozoal, prion disease?
currently, blood banks in malaria endemic areas do not screen blood for plasmodium parasites because of logistical constraints. Plus, there is no strong evidence supporting the fact that Malaria is actually a serious TTI. Rapid diagnostic kits are also available but are not highly sensitive to all plasmodium species. The baseline is that prevention of malaria transmission through blood products is more of a policy issue than its practicability.