The health care services organization in the country extends from the national level to village level. The total structure of health care system is functioning at national, state, district, community, PHC and sub-center levels. The district level structure of health services is a link between the State as well as regional structure on one side and the peripheral level structures such as Primary Health Center (PHC) as well as sub-center on the other side. Apart from the health care system providing health care at various organizational levels, there are a number of voluntary health agencies working in the country specialized to carry out a number of functions related to the development, aid and emergency relief. In addition, the Government of India has undertaken several measures to improve the health of the people by establishing various National Health Programs and schemes to reach the people.