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Zacharius Jannssen invents the microscope.
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Sir Christopher Wren was the first to administer medications intravenously by means of an animal bladder attached to a sharpened quill.
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Dr. Jean - Baptiste Denys from France infused the blood of a sheep into a little boy.
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Anton van Leewenhoek refines the microscope
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Oxygen first prepared by the Swedish chemist Scheele, who called it "fire air."
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Sir Humphrey Davis discovered laughing gas' anesthetic property while he was an assistant at an institution.
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Rene Laennec invents the stethescope. It is still considered the physician's most useful tool today.
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George Callender performs the first successful heart surgery on a patient stabbed by a long needle in his coat during a fight.
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The first vaccine for cholera was developed.
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The first vaccine for rabies was developed.
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Von Frey and Gruber introduce the first film oxygenator.
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Wilhelm Conrad Röntgen discovers medical use of X-rays in medical imaging
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Victor Horsley and R. Clarke invents the stereotactic method. This method is a minimally form of surgical intervention which makes use of a three-dimensional coordinate system to locate small targets inside the body and to perform on them some action.
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The first vaccine for diphtheria was developed. "Diphtheria is an acute infectious disease caused by the bacteria Corynebacterium diphtheriae. Symptoms usually occur 2 to 5 days after you have come in contact with the bacteria." -NCBI
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Gerhard Domagk develops a chemotherapeutic cure for streptococcus (known as strep).
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The Yellow Fever Vaccine was developed to cure this disease.
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The first vaccine for measles was developed.
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Sir Godfrey Hounsfield invents the first commercial CT scanner.
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The first vaccine for pneumonia was developed.
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Scientists discover how to use human skin cells to create embryonic stem cells.
