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
Time interval between inoculation of infection to maximum infectivity is ? 
Select and explain. 
A. Lead time, B. Median incubation period, C. Generation time, D. Serial inverval
C: Generation time
Answer: C: Generation time 
Explanation: Ans. is 'c' i.e., Generation time Generation time - Period from receipt of infection to maximal infectivity. Serial interval - Gap between onset of primary case and secondary case.