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Disciform Keratitis - University of Louisville Ophthalmology
Disciform Keratitis - University of Louisville Ophthalmology

... Anterior segment OS Corneal stromal edema in a circular form, infero-central epithelial defect 2x2 mm, inferior neovascularization from limbus to edge of ...
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What Is an Epidemic and How Does an Infection Spread?

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Vector Borne Diseases Control Program

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Chapter 9

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Pandemic



A pandemic (from Greek πᾶν pan ""all"" and δῆμος demos ""people"") is an epidemic of infectious disease that has spread through human populations across a large region; for instance multiple continents, or even worldwide. A widespread endemic disease that is stable in terms of how many people are getting sick from it is not a pandemic. Further, flu pandemics generally exclude recurrences of seasonal flu. Throughout history there have been a number of pandemics, such as smallpox and tuberculosis. More recent pandemics include the HIV pandemic as well as the 1918 and 2009 H1N1 pandemics. The Black Death was a devastating pandemic, killing over 75 million people.
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