A wartime public information film about the history of blood transfusion and how blood transfusion is being used to treat wounded troops. Blood groups and the makeup of blood are explained, the development of a blood transfusion service in the UK and in other countries is detailed, and the work of the British Red Cross and the Army Blood Transfusion Service is seen.

• DirectorHans Nieter
• Release1 January 1941
• Genre
  Documentary / Animation
• Duration0h 18m
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