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  Medical became regulated
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  Discovered the difference between meezles and small pocks
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  First medicine school
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  Hospitals were built
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  Doctors realized people caught small pox and measles from other people and that it was contagious.
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  Tried to practice medicine but was denied
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  Human anatomical studies were allowed
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  Printing press allows for publication of discoveries.
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  Reflective microscope
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  Describes bacteria
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  Used microscope to discover the plague fleas.
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  Discovery of blood cells, bacteria, protozoa, and stethoscope.
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  discovered that microorganisms cause fermentation and disease
originated the process of pasteurization
developed vaccines against rabies and anthrax - 
  
  Founder of antiseptic medicine and a pioneer in preventive medicine.
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  Aspirin was intented
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  First successful blood transfusion using Landsteiner's ABO blood type technique.
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  First vaccine for influenza
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  Discovers polio vaccine
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  Develops the first cardiac pacemaker to control irregular heartbeat
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  First vaccine made for Rubella.
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  Provided healthcare for the sick
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  First vaccine of rabbies