Indoor Residual Spraying (IRS) is a pest control method used to eliminate disease-carrying insects, such as mosquitoes and cockroaches. It involves applying a long-lasting insecticide to the interior surfaces of homes and buildings. The goal is to reduce the population of these pests and prevent the spread of diseases like malaria and dengue fever. IRS is typically conducted by trained professionals who ensure that the spraying is done safely and effectively. The insecticide remains effective for several months, providing ongoing protection. This method is particularly useful in areas where insect-borne diseases are prevalent, helping to safeguard public health.