Epidemiology & Public Health

Basic

Case Fatality Rate

Proportion of diagnosed individuals who die from the disease.

Formula

CFR = \frac{\text{Deaths}}{\text{Confirmed Cases}} \times 100

Variables

CFRCase fatality rate (%)

\text{Deaths}Deaths from the disease

\text{Confirmed Cases}Total diagnosed cases

Example

50 deaths out of 2 500 cases → CFR = 2 %

Did You Know?

CFR can be misleading during an outbreak because many cases haven't yet resolved — the true rate often differs from early estimates.

epidemiology fatality mortality cfr

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More in Epidemiology & Public Health

Incidence Rate

Rate at which new cases of a disease appear in a population over a given period.

Prevalence

Proportion of a population that has a particular condition at a point in time.

Basic Reproduction Number

Average number of secondary infections produced by one infected individual in a fully susceptible population.

Herd-Immunity Threshold

Minimum fraction of the population that must be immune to prevent sustained spread.

Effective Reproduction Number

Actual average infections per case when part of the population is already immune.

SIR Model — Susceptible

Rate of change of the susceptible population in the SIR compartmental model.