Virulence of a disease is indicated by:
Ans. (c) Case fatality rateCASE FATALITY RATE (CFR):* CFR represents 'killing power of a disease'- It is 'closely related to virulence of organism'CFR=Totalno.ofcasesduetoadiseaseTotalno.ofdeathsduetoadisease x100* CFR is a Proportion: Always expressed in percentage* CFR is the 'complement of Survival Rate', thus CFR =1 - Survival Rate* Limitations of CFR:- Time interval is not specified- Usefulness is limited for chronic diseases - CFR for the same disease may vary in different epidemics
Indicators of Health
Proportional mortality rate
Specific mortality rate
Case fatality rate
Amount of GDP spent on control of disease
Case fatality rate