The document defines a hospital and outlines its key functions. A hospital is defined by the WHO as an organization that provides both curative and preventative healthcare services. Hospitals provide diagnostic, therapeutic, emergency care, rehabilitation, preventative services, health promotion, education/training, and conduct research. Hospitals are classified based on ownership (public, private, charitable), clinical specialty (general, specialist), level of services (day care, short-term, long-term), and teaching status.