NOVELTY - Reducing the incidence of disease transmission by mosquitoes, involves administering a composition comprising: a) a composition A having an olfactory attractive index of 0.3-0.4, and with human masking effect 90 plus minus 2%; and b) a composition B having an olfactory attractive index greater than 0.47, to a target area. The composition A masks humans from the mosquitoes, and the composition B attracts contact of the mosquitoes with the target area.    USE - For reducing the incidence of disease transmission by mosquitoes and for killing mosquitoes (claimed).    ADVANTAGE - The method provides simultaneous masking and attraction feature which is unique, one of a kind and first to be done. It ensures that the users have a good night's sleep, free from mosquito bites, thus protected from harmful diseases like malaria, dengue and Chikungunya. Since the device is a mosquito killer, it reduces mosquito populations in areas of human inhabitation. The device also functions as an air purifying system by reducing the microbial load in the environment around it. It brings freshness to the room. The dry debris is collected on a mosquito collecting tray, which can be easily removed from the device and dusted off. The collecting tray will be available as disposable units, which can be replaced when ever required. The device also has a rechargeable battery (back up for 8 hours), that makes it usable in times of power outages. The device also has a level indicator to indicate that the chemical level is low and that it needs to be replaced by the refill pack. The device is low cost, consumes less power, is compact, light weight and eco-friendly when compared to similar other products. It is non-toxic and safe for use by households having infants and pregnant women. It does not give any offensive smell or other side effects like allergies or headaches. The design allows the internal frame (fixed) work to be made with any one of the outer casings provided. Hence, this adds to its aesthetic value.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) attracting mosquitoes into a target area involving applying a composition having an olfactory attractive index greater than 0.47 to the target area; and    (2) a device for reducing the incidence of disease transmission by mosquitoes using the composition, comprising: a housing; a vaporizing unit disposed within the housing for vaporizing the composition; and a asphyxiation unit disposed within the housing for generating carbon dioxide.