This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2019, Subject name: Social & Preventive Medicine
Median Incubation period means:- 
Select and explain. 
A. Time taken for 50% cases to occur, B. Time between primary case and secondary case, C. Time between onset of infection and period of maximum infectivity, D. Median of several incubation periods
A: Time taken for 50% cases to occur
Answer: A: Time taken for 50% cases to occur 
Explanation: Median incubation period - Time taken for 50% of cases to occur. Incubation period - Time interval b/w entry of organism into body till appearance of 1st signs & symptoms. Serial Interval - Time interval b/w primary & secondary case. Generation time - time interval between entry of organism into body till its maximum infectivity. Latent period - Time interval b/w onset of disease till its first detection. It is corresponding term to incubation period for non-communicable diseases.