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William Harvey discovers the circulation of blood.
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The first successful blood transfusion was in 1665 and occurred in England: Physician Richard Lower kept a dog alive by transfusing blood from other dogs
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British obstetrician James Blundell performed the first successful transfusion of human blood to a patient.
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The United States government established a national blood collection program called the Red Cross, and started early blood processing program for relief of English war victims.
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The blood banks moved toward an all-volunteer blood donor system.
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Now blood is used by researchers to help create medicines and find cures for diseases.