This document discusses occupational diseases, their causes, and strategies for prevention. It defines occupational health as the promotion of physical, mental, and social well-being of all workers. Occupational diseases are illnesses that result from exposure to hazards in the work environment, and include pulmonary, cardiovascular, hepatic, and musculoskeletal diseases. Common hazards include dust, gases, noise, toxins, vibrations, and germs. Prevention strategies involve identifying workplace hazards, training workers, implementing safety measures, conducting medical exams and surveillance, and providing treatment and compensation for occupational illnesses.