Abstract
(1) A study of the East African Campaign shows how helpless we are on field service as regards prevention of malaria in a malarious country. (2) Not only prophylaxis but also the symptoms, diagnosis and treatment of the disease are modified by the conditions of field service. (3) The accounts given of the disease in its different aspects do not represent any scientific advance but are included merely to illustrate the points considered under (1) and (2) and to show the responsible and difficult nature of the work that medical officers on field service may be called upon to do.
