This document discusses occupational hazards and diseases. It describes physical hazards like noise, radiation, vibration and thermal stress that can cause issues like hearing loss, cancer, musculoskeletal disorders and heat stroke. Chemical hazards from substances like latex, acids, silica and mineral dusts are discussed as well as their effects like burns, pneumoconiosis and ulcers. Biological hazards from places like air conditioners, rat urine and pandemics can cause diseases. It also provides examples of reporting work-related illnesses and injuries to the relevant authorities in order to improve workplace safety and health.