Of the dozen insecticides WHO has approved as safe for house spraying, the most effective is DDT.” Evidence from countries that continued using DDT showed that correct and timely use of indoor spraying can reduce malaria transmission by up to 90%.
Of the hundreds of WHO insecticides approved as safe for home spraying, DDT was the most effective." Countries that continue to use DDT have proof that the right and rapid use of indoor spraying will minimize the spread of malaria by up to 90%.