Aviation broadly defined includes the design, manufacture, use and operation of aircraft; the business of transporting passengers and freight by air; and the human factors related to aviation. The human factors include but are not limited to: the prevention and management of human error, selection and training of personnel, experience, gender, interpersonal relationships, leadership styles and job satisfaction. Organizational, mechanical, computer, environmental and other factors may also be included in aviation-related research.
Health is defined as a state of complete physical, mental, social and spiritual well-being and not merely the absence of disease and infirmity, and the ability to lead a socially and economically productive life. [Adapted from the World Health Organization (WHO) definition of health, at http://www.who.int/about/en/