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  he proves that arteries contain blood,
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  Eminent Cairo physician discovers and describes pulmonary circulation
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  Fabricius draws the first drawings of vein valves.
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  Jan Swammerdam is a microscopist thought to be the first person to observe and describe red blood cells.
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  The first recorded successful blood transfusion occurs in England: Physician Richard Lower keeps dog alive by transfusing blood from other dogs.
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  eminent British obstetrician and physiologist James Blundell performs the first recorded human-to-human blood transfusion
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  small cell fragments from the bone marrow make1877h up the bulk of clots formed in blood vessels; these cell fragments will come to be called platelets
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  Saline infusion replaces milk as a “blood substitute” due to the increased frequency of adverse reactions to milk.
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  Karl Landsteiner discoverd three main human blood groups -- A, B, and C, which he later changes to O
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  Fourth main blood type was discovered, AB.
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  Albert Hustin and Luis Agote discover that adding sodium citrate to blood will prevent it from clotting.
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  Francis Peyton Rous and J.R. Turner develop a citrate-glucose solution that allows blood to be stored for a few weeks and still be good to use
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  Percy Lane Oliver begins operating a blood donor service out of his home
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  Dr. Serge Yudin is the first to test the efficacy of transfusing humans with dead peoples blood.
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  Rh blood group was discovered by Landsteiner, Wiener, Levine and Stetson
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  Red Cross collects over 13 million units of blood over the course of the war.
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  U.S. Army and Navy, the American Red Cross organize a civilian blood donor service to collect blood plasma for the war effort.
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  community blood banks join together to form a national network of blood banks called the American Association of Blood Banks
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  the protein within red blood cells that carries oxygen.
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  The first cases of a syndrome initially called GRID
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  GRID (Gay-related Immunodeficiency Disease), is changed because prevalence among gay men, are reported. It is later renamed AIDS (Acquired Immune Deficiency Syndrome)
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  Researchers at Dr. Luc Montagnier's lab at the Institut Pasteur, in France, isolate the virus that causes AIDS. They locate it in the swollen lymph node in the neck
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  After dozens of Americans are infected with AIDS from blood transfusions. the first blood-screening test to detect the presence or absence of HIV antibodies -- the ELISA