This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
True about yellow fever - 
Select and explain. 
A. I.P is 10-14 days, B. Transmitted by Aedes, C. It is found in Asia, D. Incidence is increased by humidity
B: Transmitted by Aedes
Answer: B: Transmitted by Aedes 
Explanation: <p> YELLOW FEVER:- Zoonoses disease caused by arbovirus. Affects principally monkeys and other veebrates and is transmitted to humans by culicine mosquitoes. Reservoir- mokeys and forest mosquitoes., in urban areas reservoir is man besides Aedes aegypti. A temperature of 24 deg celcius or more required for its multiplication. Period of communicability- Blood of patients infective upto first 3-4 days {Reference: park&;s textbook of preventive and social medicine, 23rd edition, pg no.282}</p>