Health care primarily is the diagnosis, treatment, and prevention of disease, any kind of illness, injury and other physical and mental harm in humans. Health care is done by practitioners in medicine, from dentistry to nursing and pharmacy. Health care is regarded as an important factor in boosting the general health and well-being of people around the world. Health care can either be private or public. Access to health care varies from country to country. Health care includes health care systems established to meet the health needs of the people.