Health care is traditionally considered as a crucial determinant in promoting the general physical and mental health and well-being of people around the world. An example of this was the worldwide obliteration of smallpox in 1980, stated by the WHO as the first illness in human history to be completely eliminated by purposeful healthcare interventions.The delivery of modern health care depends on groups of qualified specialists and paraprofessionals coming together as interdisciplinary groups. This includes specialists in medication, psychology, physiotherapy, nursing, dentistry, midwifery and allied health, together with numerous others such as public health specialists, neighborhood health employees and assistive workers, who systematically supply individual and population-based preventive, alleviative and corrective care services.