Public health has been described as "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals."[51] It is concerned with threats to the overall health of a community based on population health analysis. The population in question can be as small as a handful of people or as large as all the inhabitants of several continents (for instance, in the case of a pandemic). Public health has many sub-fields, but typically includes the interdisciplinary categories of epidemiology, biostatistics and health services. Environmental health, community health, behavioral health, and occupational health are also important areas of public health.

1. hale, hearty, robust. 3. nutritious, nourishing. Healthy, healthful, salutary, wholesome refer to the promotion of health. Healthy, while applied especially to what possesses health, is also applicable to what is conducive to health: a healthy climate; not a healthy place to be. Healthful is applied chiefly to what is conducive to health: healthful diet or exercise. Salutary suggests something that is conducive to well-being generally, as well as beneficial in preserving or in restoring health: salutary effects; to take salutary measures. It is used also to indicate moral benefit: to have a salutary fear of devious behavior. Wholesome has connotations of attractive freshness and purity; it applies to what is good for one, physically, morally, or both: wholesome food; wholesome influences or advice.
eHealth is a free service, with an A+ rating from the Better Business Bureau, providing easy-to-use-and-understand plan finders and comparison tools. Plans sold through eHealth won't cost more than if you buy directly from one of our providers. eHealth will recommend plans that are best suited to your needs and budget, whether it's during the annual open enrollment period or if you have a qualifying life event. In certain states, eHealth can even help you apply for the Affordable Care Act tax credit offered by the government. eHealth is proudly invested in helping you with all your medical insurance questions and concerns, including:
In-Network Provider: (U.S. term) A health care provider on a list of providers preselected by the insurer. The insurer will offer discounted coinsurance or co-payments, or additional benefits, to a plan member to see an in-network provider. Generally, providers in network are providers who have a contract with the insurer to accept rates further discounted from the "usual and customary" charges the insurer pays to out-of-network providers.

There are two major types of insurance programs available in Japan – Employees Health Insurance (健康保険 Kenkō-Hoken), and National Health Insurance (国民健康保険 Kokumin-Kenkō-Hoken). National Health insurance is designed for people who are not eligible to be members of any employment-based health insurance program. Although private health insurance is also available, all Japanese citizens, permanent residents, and non-Japanese with a visa lasting one year or longer are required to be enrolled in either National Health Insurance or Employees Health Insurance.


Personal health depends partially on the active, passive, and assisted cues people observe and adopt about their own health. These include personal actions for preventing or minimizing the effects of a disease, usually a chronic condition, through integrative care. They also include personal hygiene practices to prevent infection and illness, such as bathing and washing hands with soap; brushing and flossing teeth; storing, preparing and handling food safely; and many others. The information gleaned from personal observations of daily living – such as about sleep patterns, exercise behavior, nutritional intake and environmental features – may be used to inform personal decisions and actions (e.g., "I feel tired in the morning so I am going to try sleeping on a different pillow"), as well as clinical decisions and treatment plans (e.g., a patient who notices his or her shoes are tighter than usual may be having exacerbation of left-sided heart failure, and may require diuretic medication to reduce fluid overload).[56]

Nearly one in three patients receiving NHS hospital treatment is privately insured and could have the cost paid for by their insurer. Some private schemes provide cash payments to patients who opt for NHS treatment, to deter use of private facilities. A report, by private health analysts Laing and Buisson, in November 2012, estimated that more than 250,000 operations were performed on patients with private medical insurance each year at a cost of £359 million. In addition, £609 million was spent on emergency medical or surgical treatment. Private medical insurance does not normally cover emergency treatment but subsequent recovery could be paid for if the patient were moved into a private patient unit.[53]
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