| DefinitionsNumbers
and Rates |
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| Epidemiologist |
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| – | one who
practices epidemiology |
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| Epizootiologist |
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| – | one who studies
disease outbreaks in animals |
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| Pandemic |
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| – | an outbreak of
disease over a wide geographical |
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| area such as a
continent |
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| – | influenza
pandemic of 1918-1919 killed 25 million |
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| people
worldwide |
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