Health, in accordance with the World Health Organization, is “a state of complete bodily, mental and social well-being and not merely the absence of illness and infirmity”. A variety of definitions have been used for different functions over time. Health may be promoted by encouraging healthful actions, corresponding to common physical train and adequate sleep, and by decreasing or avoiding unhealthful actions or conditions, such as smoking or excessive stress. Still different elements are beyond each individual and group choices, similar to genetic problems. The focus of public health interventions is to prevent and manage illnesses, injuries and other medical conditions via surveillance of cases and the promotion of wholesome habits, communities, and environments. Its purpose is to prevent health problems from occurring or re-occurring by implementing academic packages, developing policies, administering companies and conducting research.

• While the US healthcare system has come beneath hearth for lack of openness, new