The quality, state, or degree to which something is epidemic; the tendency or characteristic of spreading widely and rapidly through a population.
From Greek 'epidemos' + Latin '-icity' (forming abstract nouns of state or quality). This term is used in epidemiological studies to quantify epidemic characteristics.
Epidemiologists use 'epidemicity' as a technical measure—high epidemicity means a disease is really good at spreading, which helps scientists predict and prevent outbreaks!
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