This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Whooping Cough (Pertussis), Subject name: Social & Preventive Medicine
Incubation period of pertusis is- 
Select and explain. 
A. 1-7 days, B. 7-14 days, C. 15-28 days, D. More than 28 days
B: 7-14 days
Answer: B: 7-14 days 
Explanation: Ans. is 'b' 7-14 days [Ref :Park 20/e, p 149 (18/e, p136, 17/e, p130, 16/e,p129))* The I.P.'s of some more diseases which are often asked in various P.G. entrance examinations are :Incubation period of Pertussis = 7-14 days*Incubation period of Diptheria = 2-6 days*Incubation period of Mumps = 2-3 wks usually 18 days*Incubation period of Rubella = 2-3 wks usually 18 days*Incubation period of Measles = 10 days from exposure to onset of fever and 14 days to appearance of rash*.Incubation period of Chickenpox = 14-16 days*.