<prompt> Which one of the following is true regarding case fatality rate?Numerator is always constantDenominator is always constantNumerator and denominator are propoions of each otherNumerator and denominator are two separate entities  <response>: Case fatality rate No. of deaths due to disease No. of infected people Case fatality rate CFR is the ratio of deaths within a designated population of cases people with a medical condition, over the course of the disease. A CFR is conventionally expressed as a percentage. CFRs are most often used for diseases with discrete, limited time courses, such as outbreaks of acute infections. 