Which of the following is the best parameter to predict virulence of acute infectious illness?
Case fatality rate is directly related to the killing power of the disease. It denotes the virulence of an organism. But utility of case fatality rate is limited to acute illnesses and is not of much value for chronic diseases. Ref: Park 21st edition, page 55.
Incidence
Secondary attack rate
Case fatality rate
Crude death rate