A program for the detection of thalassemias and other hemoglobinopathies in high-risk populations is described. This program, based on two screening tests, was applied to the Hellenic Army recruits and was found to work well. Red cell one-point osmotic fragility was used for the detection of thalassemic samples and hemoglobin electrophoresis for screening of other hemoglobinopathies. Samples with decreased red cell osmotic fragility and/or abnormal electrophoretic pattern were submitted for further detailed investigation. Following this program, 64,814 recruits, representing 0.651% of the total Greek population and 9.917% of the 20-year-old Greek male population, were tested. beta-Thalassemia was found with an average incidence of 5.476% and alpha-Thalassemia with an incidence of 0.201%. Hemoglobinopathy Lepore was detected in 51 samples (0.079%) and hemoglobinopathy-S in 352 samples (0.543%).