Healthcare is conventionally considered as an essential factor in promoting the general physical and mental health and well-being of people worldwide. An example of this was the around the world obliteration of smallpox in 1980, declared by the WHO as the very first illness in human history to be completely removed by deliberate health care interventions.The delivery of modern health care depends upon groups of trained professionals and paraprofessionals coming together as interdisciplinary teams. This includes specialists in medication, psychology, physiotherapy, nursing, dentistry, midwifery and allied health, in addition to many others such as public health professionals, neighborhood health workers and assistive personnel, who methodically provide individual and population-based preventive, alleviative and rehabilitative care services.