Nearly all Tambon have a health center. Each health center is normally staffed by an awaliary midwife and a junior sanitarian(a technical nurse is being added to many health centers). All of the major preventive and promotive health services are responsible for prenatal, delivery and postnatal services, child immunizations nutri- tion. family planning and water supply and sanitation activities. Health centers also provide limited treatment of emergency or minor illnesses and refer to district or provincial hospitals. The health center also serves as referral unit at the primary and provides technical support to the village for the development of its PHC programme. Supervision and support to VHC and VHV are of prime Concern. particularly in the self-management of PHC elements and community organization.