Answer provided by the American Mosquito Control Association, www.mosquito.org
"Carbon dioxide is the most universally recognized mosquito attractant and draws mosquitoes from up to 35 meters. When female mosquitoes sense carbon dioxide they usually adopt a zigzagging flight path within the plume to locate its source. Once in the general vicinity of a potential host, other cues predominate, including body odors (sweat, lactic acid, etc.) and heat. Conversely, eating bananas did not attract mosquitoes as the myth suggests, but wearing perfumes does. People drinking beer have been shown to be more attractive to mosquitoes. Limburger cheese has also been found to be attractive" The information on this website has been gathered from numerous sources including the Centers for Disease Control and Prevention (CDC), www.cdc.gov, the National Institute of Health (NIH), www.nih.gov, the Environmental Protection Agency (EPA), www.epa.gov and the American Mosquito Control Association, www.mosquito.org.