<prompt> Yellow fever is caused by -ArbovirusAlpha virusSindbisChikungunaya virus  <response>: 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 