A key strategy for malaria control under the National Vector Borne Disease Control Programme (NVBDCP) involves protecting communities from mosquito bites, especially indoors. Which of the following interventions is primarily used for this purpose in endemic areas?

Explanation

Indoor Residual Spraying (IRS) involves spraying insecticides on the inner walls of houses, where mosquitoes (primarily *Anopheles* species for malaria) rest after feeding, thus killing them. This is a primary vector control strategy for malaria under NVBDCP, along with the distribution of Long-Lasting Insecticidal Nets (LLINs). Mass Drug Administration (MDA) is a strategy for Lymphatic Filariasis elimination. Larval Source Reduction is primarily effective against *Aedes* mosquitoes (Dengue/Chikungunya). Vaccination campaigns are used for diseases like Japanese Encephalitis, not as a primary vector control for malaria.