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
Severity of acute disease can be best analyzed by? 
Select and explain. 
A. Standardized moality ratio, B. Cause specific death rate, C. Case fatality rate, D. Age specific death rate
C: Case fatality rate
Answer: C: Case fatality rate 
Explanation: Case fatality rate represents the killing power of a disease. Typically used for acute diseases like food poisoning, cholera, measles. it is simply the ratio of deaths to cases. ref: Park&;s 23rd edition pg 58.