Nearly thirty years after phasing out the widespread use of indoor spraying with DDT and other insecticides to control malaria, the World Health Organization (WHO) today announced that this intervention will once again play a major role in its efforts to fight the disease. WHO is now recommending the use of indoor residual spraying (IRS) not only in epidemic areas but also in areas with constant and high malaria transmission, including throughout Africa.
http://www.who.int/mediacentre/news/releases/2006/pr50/en/index.html
http://www.who.int/mediacentre/news/releases/2006/pr50/en/index.html