Health care or
healthcare is the maintenance or improvement of
health via the
diagnosis,
treatment, and
prevention of
disease,
illness,
injury, and other
physical and mental impairments in human beings. Health care is delivered by
health professionals (providers or practitioners) in
allied health professions,
chiropractic,
physicians,
dentistry,
midwifery,
nursing,
medicine,
optometry,
pharmacy,
psychology, and other
health professions. It includes the work done in providing
primary care,
secondary care, and
tertiary care, as well as in
public health.