Health care is the maintenance and improvement of personal health through the prevention, diagnosis, treatment, cure of the ailment, illness and other physical and mental impairmentsin people. Health care is delivered by health professionals aka doctors and health care workers.Dentistry, Pharmacy, nursing, psychology and other health professions are all part of health care. It includes work done in providing primary care, secondary care, and tertiary care.

Access to health care may vary across countries, communities, and individuals, influenced by social and economic conditions as well as health policies.Providing health care services means "the appropriate use of health services to achieve the best possible health outcomes".Factors to access healthcare include financial limitations, geographical barriers and personal limitations like illiteracy, low income.

Health care systems are organizations that are established to meet the health needs of the world One such worldwide organisation is World Health Organization (WHO). According to which a well-functioning health care system requires a financing mechanism, a well-trained workforce , reliable information on which decisions and policies are based and well maintained technologies to deliver quality medicines.

An efficient health care system can contribute to a significant part of a country's economy, development and industrialization. Health care is regarded as an important factor in promoting the general physical and mental health and well-being of people around the world. An example of this was the worldwide eradication of smallpox in 1980, declared by the WHO as the first disease in human history to be completely eliminated by deliberate health care interventions.

A recent example is the worldwide pandemic-Covid 19 (Novel corona virus) in which the health care workers have played a vital part in saving the lives of the people all over the world where they emerged as the heroes of the world.