 An extensive network of public clinics offers primary health care at low cost.In rural areas, each village or group of villages has a "health house" staffed by community health workers, locals trained in preventative healthcare methods such as nutrition, family planning, taking blood pressure, prenatal care, immunization, and monitoring environmental conditions such as water quality.Each health house is equipped with an examination room and sleeping quarters, and has a staff of one man and one or more women, all of whom are from the villages they serve.