This data-set relates to a study of the prevalence of Loa loa (eyeworm) in a series of surveys undertaken in 197 villages in west Africa (Cameroon and southern Nigeria). Each row of the data-file contains the following information: ROW 1 to 197 VILLCODE village id LONGITUDE in degrees LATITUDE in degrees NO_EXAM number of people tested NO_INF number of positive test results ELEVATION height above sea-level in metres MEAN9901 mean of all NDVI values recorded at village location, 1999-2001 MAX9901 maximum of all NDVI values recorded at village location, 1999-2001 MIN9901 minimum of all NDVI values recorded at village location, 1999-2001 STDEV9901 standard deviation of all NDVI values recorded at village location, 1999-2001 Please acknowledge the source of these data as: Diggle, P.J., Thomson, M.C., Christensen, O.F., Rowlingson, B., Obsomer, V., Gardon, J., Wanji, S., Takougang, I., Enyong, P., Kamgno, J., Remme, H., Boussinesq, M. and Molyneux, D.H. (2007). Spatial modelling and prediction of Loa loa risk: decision making under uncertainty. Annals of Tropical Medicine and Parasitology, 101, 499-509.