“…It usually is precipitated by an acute infectious disease, commonly acute diarrheal disease. 2 A usual view of infectious disease, seen in less favored areas of the world, is of exotic conditions such as plague, yellow fever, trypanosomiasis, or onchocerciasis. The present study is of behavior in those regions of the simple diseases that are prevalent wherever one lives: measles, whooping cough, mumps, chickenpox, and rubella-the common communicable diseases of childhood.…”