A Unitaid delegation visited a malaria Indoor Residual Spraying project on the outskirts of Maputo in Marracuene. Spraying the walls and eaves of houses with insecticide, a technique called Indoor Residual Spraying (IRS), is an effective way to kill malarial mosquitoes. But the increased resistance of mosquitos to older insecticides and the high price of new alternatives has caused indoor spraying to fall by 40 percent over the past four years. Unitaid has invested US$65 million to create a sustainable market for affordable new insecticides against malaria. The four-year project, being implemented by the Innovative Vector Control Consortium, aims to protect as many as 50 million people from malaria in 16 African countries. Two to three new insecticides are expected to reach the market by 2020.