Public health is the science and art of preventing disease, to extend life and promoting health organized efforts and informed choice of society, organizations, public and private, describes churches and individuals. It applies to the threats, the general health of the community based on the analysis of public health. This population can be as small as a handful of people or just all the inhabitants of several continents (for example, when a pandemic). Public health has many sub-sectors, but is typically a multidisciplinary team of epidemiology, biostatistics and health. Environment and health, mental health, and health are also important areas of public health.
Health issues, the injury and the promotion of healthy lifestyles, communities and environments are focused on public health, the prevention and control of diseases, injuries, and others. And 'an event or a number of health problems through educational programmes, the development, so that the management services and research. In many cases, the disease can be prevented by the treatment or control of the virus to others, such as for example, during an epidemic. Vaccination programs and distribution of condoms to the transmission of infectious diseases to prevent, are examples of preventive measures.
Public health has also a number of steps in the inequalities between different parts of the continent, the country or the world. The big question is access to individuals and communities, access to health, economic, cultural and geographical and use of the services. Applications for public health include mother and child health, health services administration and preparation of the prevention and combating of infectious diseases and chronic diseases.
Positive impact on the public health programs are universally recognized. Partly due to the policies and measures, public health, the 20 century is designed to reduce mortality in children and a constant increase in life expectancy in many parts of the world. It has, for example, a life expectancy of Americans, an estimated 30 years since 1900 and the world in 1990, six years ago.
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