-He discovered that pure plasma could be used for blood transfusions; this meant that a patient did not have to have the same blood type as the donor.
-He discovered a way to separate plasma from red blood cells, which made plasma transfusions possible.
-He discovered a way to store blood for a week, whereas before it could only be stored for one or two days. His plasma discovery allowed blood to be stored for much longer, which made blood banks possible.
-He established and was director of the first Red Cross Blood Bank.
-He organized the world's first blood bank project, which was for British soldiers in WWII.
-Before Drew's discoveries there was a frantic search for a blood donor whenever anyone needed a blood transfusion for survival--survival was of course slim, especially in war. Following his discoveries doctors and medics merely had to tap into stored blood to save a patient's life.
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