Occupational disease is any chronic disease that results from work or livelihood. It is a factor in occupational safety and health. Occupational disease is usually identified when it is shown to be more prevalent in a given body than the general population, or in other workers. The first such disease that was diagnosed, squamous-cell carcinoma of the scrotum, was identified in a chimney sweep by Sir Percival Pott in 1775. Occupational hazards with a serious condition (such as falling off a roof) are not considered to be effective. diseases.
Under workers' compensation law in many states, it is presumed that this particular disease is caused by an employee at work and that the burden comes from the employer or insurer to indicate that the disease is due to another cause. Diseases compensated by national workers' compensation authorities are often referred to as occupational diseases. However, many countries do not provide compensation for certain diseases such as work-related musculoskeletal disorders (e.g. Norway). Thus, the term work-related disease is used to describe occupational diseases. The term will then include both chronic and non-compensatory diseases with functional origins.