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Tracheotomy
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Discovered difference between smallpox and measles.
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Health care for the sick.
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Use of scientific method begins.
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Reflective microscope
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Francis Bacon uses microscope to discover plague fleas.
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John Snow stops outbreak of cholera.
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Marie Curie discovers science of radioactivity.
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Bubonic plague hits San Francisco
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Alexander Fleming discovers penicillin
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First HMO insurance
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WHO declares smallpox eradicated
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Steve Thomas used sterile maggots for infectious wound treatment
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A vaccine to prevent cervical cancer approved by the PDA
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Scientists discover how to use human skin cells to create embryonic stem cells
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