Definitions for **"Case fatality rate"**

Case fatality rate is a mathematical quantity that describes the severity of a disease Y. Usually applied to acute diseases, it is the proportion of persons diagnosed with a disease Y who actually die from disease Y during the period of observation: CFR in population p = # dying from disease Y in population p# with disease Y in population p Thus, diseases with high CFRs can be considered to be more severe than those with low CFRs.

The proportion of cases of a specified condition that is fatal within a specified time. See also case; fatality rate.

Proportion of cases of a condition that are fatal; the number of deaths attributed to the condition divided by the number diagnosed.