Health care, or healthcare, is the treatment and management of illness, and the preservation of health through services offered by the medical, dental, complementary and alternative medicine, pharmaceutical, clinical sciences (in vitro diagnostics), nursing, and allied health professions. Health care embraces all the goods and services designed to promote health, including “preventive, curative and palliative interventions, whether directed to individuals or to populations”. The definition of health care is continuously evolving and varies significantly between different cultures.
Before the term health care became popular, English-speakers referred to medicine or to the health sector and spoke of the treatment and prevention of illness and disease. The social and political issue of access to healthcare in the US has led to public debate and confusing use of terms such as "health care" (medical management of illness or disease), health insurance (reimbursement of health care costs), and the public health (the collective state and range of health in a population).
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