Case fatality rate

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In epidemiology, case fatality rate (CFR), or sometimes more accurately case-fatality risk, is the proportion of people who have been diagnosed with a certain disease and end up dying of it. Unlike a disease's mortality rate, the CFR does not take into account the time period between disease onset and death. A CFR is generally expressed as a percentage. It is a measure of disease lethality, and thus may change with different treatments. CFRs are most often used for discrete, limited-time courses, such as acute infections.

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