The health care industry involves the organized activities related to health care services provided to a community. It includes health care services, suppliers of these services like physicians and nurses, and users of the services. The logistics of providing and acquiring health care services involves costs related to infrastructure, personnel, delivery, marketing, and payment sources like users, insurance, and government funds. Key factors that affect all aspects of the health care industry are demand for services, supply of providers, regulations, competition, and sustainability.