epidemiologist – n. medical: an expert in the study of how disease spreads and can be controlled

exponentially – adj. very fast; increasingly very quickly

encourage – v. to make (something) more appealing or more likely to happen; to persuade

chronic – adj. medical: continuing or happening again and again for a long time

approximately – adj. almost correct or exact; about

attributed – v. to explain by showing a cause <attributed his success to his coach>

epidemic – n. a situation in which a disease spreads quickly and affects many people

alarming – adj. of or related to a signal or warning


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