If the number of people who become ill during an epidemic rises gradually,this is called a(n)

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A propagated epidemic is characterized by a gradual increase in the number of people who become ill over time. This is in contrast to a common source epidemic, where a large number of people become ill at the same time due to exposure to a contaminated source. Promulgated and index epidemics are not recognized terms in epidemiology.

If the Number of People Who Become Ill During an Epidemic