The basic (CATT) sleeping sickness test in Bebongo village, Kiri health zone, in northern Bandundu Province, DRC. The finger is pricked and a drop of blood is mixed with a reagent in a rotator. If the sample shows positive, further more specific tests are required to determine whether the person has sleeping sickness and, if so, what stage of the disease. MSF is conducting large-scale screening for sleeping sickness to determine the prevalence in several particularly remote areas of DRC. These are areas where where sleeping sickness has been known in the past, but where inaccessibility means the national sleeping sickness programme has not been able to conduct active screening for years, sometimes more than a decade.