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Zacharius Jannssen invents the microscope
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Sir Christopher Wren experiments with canine blood transfusions
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Anton van Leeuwenhoek discovers blood cells
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Giacomo Pylarini gives the first smallpox inoculations
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Crawford W. Long uses ether as a general anesthetic
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Charles Gabriel Pravaz and Alexander Wood develop the syringe
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Louis Pasteur identifies germs as cause of disease
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First vaccine developed for cholera
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First contact lenses developed
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First vaccine developed for typhoid fever
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Felix Hoffman develops aspirin
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Karl Landsteiner introduces the system to classify blood into A, B, AB, and O groups
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Edward Mellanby discovers that lack of vitamin D in the diet causes rickets
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Insulin first used to treat diabetes.
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Insulin first used to treat diabetes
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First vaccine developed for diphtheria.
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First vaccine developed for whooping cough
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First vaccine developed for yellow fever
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First vaccine developed for influenza
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Gertrude Elion patented a leukemia-fighting drug
Dr. Joseph E. Murray performs the first kidney transplant -
First vaccine developed for measles.
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First vaccine developed for mumps
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First test-tube baby is born
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First vaccine developed for meningitis.
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HIV, the virus that causes AIDS, is identified
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First vaccine developed for hepatitis A.
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First vaccine to target a cause of cancer
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First vaccine for developed for rabies by Louis Pasteur