The USAID-sponsored NetMark Project at the Academy for Educational Development (AED) conducted baseline surveys on mosquito nets in 2000 in Nigeria, Senegal and Zambia. In 2004, NetMark again administered the survey in those countries, as well as in Ghana and Ethiopia. Sample sizes ranged from 1000 to 2000 households per country, with a 40:60 urban-rural ratio in each country. Respondents were women of reproductive age responsible for at least one child under the age of five. In each country, the sample was drawn from five different sites in malarious areas.