Healthcare is traditionally considered as an important factor in promoting the basic physical and psychological health and well-being of individuals around the globe. An example of this was the worldwide eradication of smallpox in 1980, declared by the WHO as the very first disease in human history to be totally eliminated by intentional health care interventions.The delivery of contemporary healthcare depends on groups of skilled specialists and paraprofessionals coming together as interdisciplinary teams. This consists of experts in medication, psychology, physiotherapy, nursing, dentistry, midwifery and allied health, along with numerous others such as public health specialists, community health employees and assistive workers, who methodically provide individual and population-based preventive, alleviative and corrective care services.