Female mosquitoes show intense human host-seeking behavior. Attraction to components of human odor such as lactic acid is enhanced by carbon dioxide (CO2). This sensitization to otherwise unattractive human cues is poorly understood. The aim of my project as a Grass Fellow is to understand how human odor processing occurs downstream of Olfactory Sensory Neurons in the brain of the Dengue fever mosquito, Aedes aegypti.