The annual World Day for Safety and Health at Work on April 28 promotes the prevention of occupational accidents and diseases. It is an awareness-raising campaign intended to focus international attention on the magnitude of the problem and on how promoting and creating a safety and health culture can help reduce the number of work-related deaths and injuries.

New and emerging occupational risks may be caused by technical innovation or by social or organizational change, such as:

• New technologies and production processes, e.g. nanotechnology, biotechnology
• New working conditions, e.g. higher workloads, work intensification from downsizing, poor conditions associated with migration for work, jobs in the informal economy
• Emerging forms of employment, e.g. self-employment, outsourcing, temporary contracts

They may be more widely recognized through better scientific understanding, e.g. the effects of ergonomic risks on musculoskeletal disorders.

They may be influenced by changes in perceptions about the importance of certain risk factors, e.g. the effects of psychosocial factors on work-related stress.