morbidity
US /mɔːrˈbɪd.ə.t̬i/
UK /mɔːrˈbɪd.ə.t̬i/

1.
the condition of being diseased or unhealthy; the rate of disease in a population
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The study examined the morbidity and mortality rates of the elderly.
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Reducing childhood morbidity is a key public health goal.
2.
the quality of being unwholesome or disturbing, especially in a grim or gruesome way
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His fascination with true crime often led to discussions of a certain morbidity.
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The film explored themes of death and decay with a disturbing sense of morbidity.