Health care systems are organizations established to satisfy the health needs of targeted populations. According to the planet Health Organization (WHO), a well-functioning health care system requires a financing mechanism, a well-trained and adequately paid workforce, reliable information on which to base decisions and policies, and well maintained health facilities to deliver quality medicines and technologies.
An efficient health care system can contribute to a big a part of a country's economy, development, and industrialization. Health care is conventionally considered a crucial determinant in promoting the overall physical and psychological state and well-being of individuals round the world. An example of this was the worldwide eradication of smallpox in 1980, declared by the WHO because the first disease in human history to be completely eliminated by deliberate health care interventions.