Health : Health is state of complete physical and mental well being not merely an absence of disease or infirmity.Sullivan’s index: This index (expectation of life free of disability) is computed by subtracting from the life expectancy the probable...

Occupational diseases are usually defined as diseases arising out of or in the course of employment. They are as follows: I. Diseases due to physical agents:(1) Heat: Heat hyperpyrexia, heat exhaustion, heat syncope, heat cramps,burns and local...