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  China started to use a substance for tooth fillings, made from silver and tin.
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  The first pharmacy was established in Baghdad.
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  Discovered the difference between smallpox and measles.
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  Performed the first successful eye surgery.
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  Roger Bacon invents the spectacles to help patients see better.
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  The Island of Santa Maria Di Nazaret was made into a hospital in order to isolate contagious patients from the rest of the population.
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  Starts to dissect corpses to learn more about the human body.
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  Pioneered the treatment of gunshot wounds.
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  Vesalius publishes his findings on human anatomy in De Fabrica Corporis Humani.
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  Invented the microscope to look at small substances more closely.
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  Discovers blood cells.
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  Performs the first successful appendectomy.
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  First vaccine developed for typhoid fever.
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  First vaccine developed for Bubonic Plague.
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  Develops aspirin
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  First vaccine developed for diphtheria.
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  First vaccine developed for whooping cough.
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  Discovers penicillin
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  Invented the first cardiac pacemaker.
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  HIV, which causes AIDS, is identified.