At the end of the module, the learner is able to 1. With regard to chemical hazards: a. Describe exposure situations and route of absorption b. Explain toxicological mechanisms and resultant health effects on the worker c. Design programmes for the control of these hazards at the workplace 2. With regard to biological hazards: a. Describe exposure situations and route of entry b. Explain the health impact on the worker c. Design programmes for the prevention of occupational infections 3. With regards to safety, physical, ergonomic and psychosocial hazards: a. Evaluate these hazards at the workplace. b. Explain the impact of these hazards on the health of the worker. c. Design programmes for the control of these hazards at the workplace.