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English definition of “contagion”

contagion

noun [U]     /kənˈteɪ.dʒən/ formal
the situation in which a disease is spread by touching someone or something: The doctor says there's no chance/danger of contagion.Passing on illness and causing disease the situation in which feelings, ideas, or problems spread from one place to another: Brazil's stock markets were battered by contagion from the problems in other emerging markets.Economics and the state of the economy
(Definition of contagion noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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