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
Propagative epidemic, transmission is - 
Select and explain. 
A. Person to person, B. Animal to person, C. Water to person, D. Fomite to person
A: Person to person
Answer: A: Person to person 
Explanation: .a propagated epidemic is usually of infectious origin.its mode of transmission is from person to person always.the epidemic usually shows a gradual rise and tails off over a much longer time.transmission continues untill the number of susceptibles depleted.the speed of spread depends upon herd immunity ,oppounities for contact and secondary attacks rates.occur commonly in aggregated populations. ref:park&;s textbook,22 nd ed,pg 63