This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
You are conducting a study on a new type of infectious disease and find that the case fatality rate is high. It means that: 
Select and explain. 
A. The disease is highly infective, B. The disease has a sho incubation period, C. The disease is caused by a virulent organism, D. All the above
C: The disease is caused by a virulent organism
Answer: C: The disease is caused by a virulent organism 
Explanation: Case fatality rate = Total number of deaths due to a paicular disease/Total number of cases of the same disease It is a measure of the killing power of a disease and is closely related to the virulence. Ref: Park, Edition 21, Page - 54.