Yes. Mosquito attraction to humans is a very complex matter. Primarily, mosquitoes are attracted to the carbon dioxide (CO2) emitted from the breath and to the chemicals produced by the skin. In addition to CO2, some species of mosquitoes are attracted to certain fragrances and colors. During mosquito season it is recommended that people who wish to be less attractive to mosquitoes wear unscented products (hair spray, soap, deodorant, etc.) and light-colored, loose-fitting clothing.
Another way to become less attractive to human-biting mosquitoes is to wear commercially available, proven mosquito repellents. The most common proven repellent is DEET (N,-diethyl-meta-toluamide). There are many unproven products commercially available as mosquito repellents. No matter what repellent is used, the entire label should be read thoroughly.