Healthcare is conventionally considered a crucial factor in promoting the general physical and psychological health and well-being of individuals around the globe. An example of this was the worldwide eradication of smallpox in 1980, stated by the WHO as the first disease in human history to be completely removed by purposeful healthcare interventions.The delivery of modern healthcare depends on groups of skilled specialists and paraprofessionals coming together as interdisciplinary teams. This includes specialists in medicine, psychology, physiotherapy, nursing, dentistry, midwifery and allied health, together with lots of others such as public health practitioners, community health workers and assistive personnel, who systematically offer personal and population-based preventive, alleviative and rehabilitative care services.