After collection, donated blood follows a careful, regulated path to ensure safety and usefulness. First, units are labeled and sent to a testing laboratory where samples are screened for infectious diseases and blood type confirmed.
Processing and components
Whole blood is commonly separated into components — red blood cells, platelets, and plasma — so one donation can help multiple patients depending on need. Components are processed, tested, and packaged for storage.
Storage and shelf life
Different components have different storage requirements: red cells are refrigerated and can last several weeks, platelets are stored at room temperature with agitation and have a short shelf life (about 5–7 days), and plasma can be frozen for longer-term use.
Distribution
Blood banks manage inventories and distribute compatible components to hospitals and clinics. When a transfusion is required, units are cross-matched to ensure compatibility and safety for the recipient.
Source: national blood services and WHO guidance. For local procedures and questions, contact your regional blood service.