Normally, the Blood Preparing Ward of the Central Institute of Hematology and Blood Transfusion has 57 employees. On the occasion of blood donations, the number rises to nearly 100 people to ensure the preparation of the collected blood.

After the preparation, blood bags are put into an automatic centrifuge system to create subclasses of the blood such as red blood cells, platelets and plasma.

After the centrifugation of blood bags, technicians will immediately perform the next step: separating blood components into different bags.

This is the volume of red blood cells collected from the original blood bags. For the safety of blood products, the collected blood must be produced in eight hours since the blood is collected and the deadline is up to 24 hours. During blood donations, technicians have to work through the night.

This job requires meticulous and absolute accuracy. The blood bags are screened for infectious diseases like hepatitis B, hepatitis C, HIV, syphilis and malaria to ensure "clean blood" for patients.

This screening step is performed automatically on modern systems. 

The blood products will be stored in the cold boxes.

Technicians always expect to be busy because it means that patients will have enough blood. When blood is in shortage, reserved blood is for severely ill patients.