What is the recommended Aedes aegypti index value to ensure freedom from yellow fever?: (A) <0.1 %, (B) <1%, (C) <0.5%, (D) <5%
Answer is B. Aedes aegypti index is used for surveillance of Aedes mosquitoes by WHO. The index should be< 1% in towns and sea pos in endemic areas to ensure freedom from yellow fever. Ref: Park 21st edition, page 259.