This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Case fatality rate indicates : 
Select and explain. 
A. Severity of disease, B. Prevalance of disease, C. incidence of disease, D. Morbidity of disease
A: Severity of disease
Answer: A: Severity of disease 
Explanation: Ans. is 'a' ie Severity of disease Total no. of deaths due to a particular diseaseCase fatality rate x 100Total no. of cases due to the same diseaseIt represents the killing power of the disease.Also RememberIt's a ratio *, not rate.It is used for acute infectious diseases* its usefulness for chronic disease is limited.