Public Health has been defined as the science and the art of obviating disease, perpetuate life and promoting human health through organized efforts and apprised culls of society, organizations, public and private, communities and individuals. Public health is an interdisciplinary field. For example, epidemiology, biostatistics and management of health accommodations are all germane. Other consequential subfields include environmental health, community health, behavioural health, health economics, public policy, noetic health, occupational safety, gender issues in health, and sexual and reproductive health. The main aim of public health is to ameliorate the quality of the life. Public health involves in the application of many different aspects like Biology, Anthropology, Public policy, Mathematics, Engineering, Inculcation, Psychology, Computer science, Sociology, Medicine. Sundry public health agencies have been established to avail control and monitor disease within societies, on both national and international levels. For example, the Coalesced Kingdom’s Public Health Act of 1848 established a special public health ministry for England and Wales. In the Coalesced States, public health is studied and coordinated on a national level by the Centres for Disease Control and Obviation (CDC). Internationally, the World Health Organization (WHO) plays an equipollent role. Public health fascinates withal have turned to disorders such as cancer, cardiovascular disease, thrombosis, lung disease, and arthritis, among others. There is incrementing evidence that several of these disorders are caused by factors in the environment. Among consequential functions of the organization are the advisory accommodations offered to regimes through its regional staff. Regional offices in a number of countries, industrialized and less-developed, as well as local representatives in many less-developed countries, avail WHO maintain contact with needs and sources of financial avail. In specialized fields, a number of expert committees consider concrete questions. The work of the WHO includes the three main categories of the activities. First, clearinghouse with information about the disease throughout the world, and it has developed in a uniform system for the reporting diseases and causes of the death. It has established internationally accepted standards for drugs and drawn up a list of “essential” (efficacious, frugal, and reliable) drugs. The population accommodated by a local health unit may be only a few thousand or several hundred thousand. There are substantially different quandaries involved in administering health accommodations for a sizably voluminous rural area that is sparsely populated and a municipality with a population of one or two million. There is a trend toward regional orchestrating of comprehensive health accommodations for defined populations. In idealized plan, the first level of contact between the population and the system, which can be called as primary care, and provided by the health personnel who works under the community health centres and who reach beyond the health centres into the communities and homes with preventive, promote, and edifying accommodations. In public health, Voluntary effort is a paramount part of health work in the Coalesced States. Voluntary agencies in the health field function mostly at the local level, though they additionally may be active at state and national levels. Medical care is a provided and paid through many channels, including public institutions, such as municipal, county, state, and also federal health centres, hospitals, and medical care programs, and private hospitals and private practitioners working either alone or, increasingly, in groups. Generally, medical care is financed by public mazuma, voluntary health indemnification, or personal payment.