system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The principal vector of dengue virus-
assistant
The correct answer is  The principal vector of dengue is the mosquito Aedes aegypti, which breeds in standing water; collections of water in containers, water based air coolers & tyre drumps are a god environment for the vector in large cities. Reference: Harrison20th edition pg 879