Fig. 1

Geographic map showing the three study areas of Asembo, Gem and Karemo in Siaya County of western Kenya where insecticide-treated nets were introduced in 1997, 1998 and 2004, respectively
Geographic map showing the three study areas of Asembo, Gem and Karemo in Siaya County of western Kenya where insecticide-treated nets were introduced in 1997, 1998 and 2004, respectively