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  The first tracheotomy ( incision in windpipe to made to relieve an obstruction in breathing) was performed by Prasovala in 100
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  Bian Que becomes the first physician to use acupuncture and pulse diagnosis
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  Alcmaecon of Croton distinguished veins and arteries
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  Rhazes discovered the difference between smallpox and measles
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  Avicenna's The Canon of Medicine, a medical encyclopedia which summarized the medicine of Greek, India, and Muslim physicians until that time. It later became an authoritative text in European medical education until early modern period.
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  In 1550 Britain built 3 small hospitals, which were some of the first hospitals built.
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  Dutch lens grinder Zacharius Jannssen invented the microscope
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  The use of the scientific method begins
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  invented the reflective microscope
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  Francis Bacon used the microscope to discover plague fleas.
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  Giacomo Pylarini gives the first smallpox moculations
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  Rene Laennec invents the stethoscope
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  First successful human blood transfusion performed by James Blundell
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  John Snow stops the outbreak of cholera
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  Bubonic plague hits San Francisco
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  Earle Dickson invented the band aid
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  insulin is used for the first time to treat diabetes
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  Jonas Salk develops the first polio vaccine
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  Gardasil, a vaccine to prevent cervical cancer approved by the FDA
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  The first FDA approved implanted AbioCor artificial heart placed in a patient on June 24, patient died on August 23.