Healthcare is traditionally regarded as an important determinant in promoting the basic physical and mental health and well-being of individuals around the world. An example of this was the around the world eradication of smallpox in 1980, declared by the WHO as the first disease in human history to be entirely eliminated by purposeful health care interventions.The delivery of contemporary health care depends on groups of skilled experts and paraprofessionals coming together as interdisciplinary groups. This includes experts in medicine, psychology, physiotherapy, nursing, dentistry, midwifery and allied health, along with many others such as public health professionals, community health employees and assistive workers, who methodically supply personal and population-based preventive, alleviative and corrective care services.