Mosquitoes, using a special organ located next to the proboscis, can detect a source of carbon dioxide at a distance of 50 meters. All people exhale carbon dioxide during the natural process of breathing, but someone exhales more, and someone less. For example, the exhalation of a pregnant woman contains 21% more carbon dioxide than other people. But children will not attract the attention of mosquitoes so much, since they exhale less carbon dioxide than adults.