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
Communicability is best measured by - 
Select and explain. 
A. Serial Interval, B. Case fatality rate, C. Secondary attack rate, D. Generation time
C: Secondary attack rate
Answer: C: Secondary attack rate 
Explanation: Ref:Parks 23rd edition pg 61, 100 SAR is defined as the number of exposed persons developing the disease within the range of the incubation period, following exposure to the primary case. Hence it shows the communicability