Mosquito repellents are substances designed to keep mosquitoes away from people and animals. They work by masking the scents that attract mosquitoes or by emitting odors that are unpleasant to them. Common active ingredients in these products include DEET, Picaridin, and Oil of Lemon Eucalyptus. Repellents can be found in various forms, such as sprays, lotions, and wipes. Using mosquito repellents is especially important in areas where mosquitoes can transmit diseases like West Nile virus and Zika virus. To ensure effectiveness, it's essential to apply the repellent according to the manufacturer's instructions and reapply as needed, especially after sweating or swimming.