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  Discovered the difference between measles and small pox
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  The discovery and distinction of the small pox virus is very important in history because that was a dangerous illness in the middle ages.
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  Forbade anyone from practicing medicine without a license, in indicating that doctors were clearly under some form of regulation.
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  Permitted to anyone who had a medical license to teach there regardless of religion or backround
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  Asclepius Greek God of healing; Caduceus is the symbol for medicine
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  Pain is considered a symptom and is watched carefully and used in the diagnosis of disease and conditions.
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  The plague ravaged Europe, and rich and poor alike succumbed with terrifying speed.
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  The largest plague wiping out almost half of the population of the time.
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  An outbreak of Bubonic Plague broke out in
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  Tries to practice medicine but its denied
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  Considered one of the fathers of surgery and modern forensic pathology.
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  English medical doctor physical
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  Discovered a vaccine for smallpox
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  Sets out fees for surgeons and punishments for malpractice.
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  Performs the first successful transfusion of human blood.
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  Discovers antitoxins and uses them to develop tetnaus and diptheria vaccines
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  Discovered x-rays
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  Americas first cardiologists
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  Discovers vitamin D and shows that its absence causes rickets
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  performs the first kidney transplant between identical twins.
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  implants the Jarvik-7 artificial heart into patient Barney Clark. Clark lives 112 days.
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  Approves the first human clinical trials in the United States for a wearable artificial kidney designed by Blood Purification Technologie....