Epidemiology and Public Health quizzes
How diseases spread, what puts populations at risk, and how evidence guides prevention and public health decisions.
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From Epidemiology and Public Health: Measures of Disease Frequency · Incidence and Prevalence
A treatment now cures an infection in days instead of weeks, and incidence is unchanged. What happens to prevalence?
- Prevalence rises
- Prevalence stays unchanged
- Prevalence falls
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Answer: Prevalence falls
Shorter illness means cases leave the 'pool' of existing cases sooner, so fewer people are sick at any given time.
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