Occupational health is defined as the highest degree of physical, mental and social well-being of workers in all occupations. It is the branch of healthcare which deals with all aspects of health and safety at the workplace. It lays strong emphasis on the prevention of hazards at a primary level. Occupational health is essentially preventive medicine [1]. Consider the following facts from India: total population is 1.324 billion (2016); gross national per capita income (PPP) is 6490$; life expectancy at birth (Male/Female) is 67.3/69.8 years; probability of dying under the age of five (per 1000 live births) is 48; total expenditure on health per capita is 75$; and total expenditure on health as a percentage of GDP is 4.7 [2].
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Rajat Kumar Saha (2018) studied this question.