BSIP, JOSE OTO / SCIENCE PHOTO LIBRARY BSIP, JOSE OTO / SCIENCE PHOTO LIBRARY
Blood preparation. Technician holding a bag of blood during the removal of white blood cells. This filtration is done before the blood is bagged and made ready for transfusions. Before this, the blood was analysed to ensure that it did not contain any bacteria or other pathogens. Photographed at a blood bank in Bordeaux, France.
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