text: The**WHO**is following a global approach towards**occupational health**. They summarised their base of 
  evidence on global working conditions in some**key facts**:332 
  
  • 
  
  *In many countries more than half of workers are employed in the informal sector with no social*
  *protection for seeking health care and lack of regulatory enforcement of occupational health and*
  *safety standards.*
  
  •*Occupational health services to advise employers on improving working conditions and*
  *monitoring the health of workers cover mostly big companies in the formal sector and more than*
  *85% of workers in small enterprises, informal sector, agriculture and migrants worldwide do not*
  *have any occupational health coverage.*
  
  •*Work-related health problems result in an economic loss of 4–6% of GDP for most countries.*
  *The basic health services to prevent occupational and work-related diseases cost on average*
  *between US$ 18 and US$ 60 (purchasing power parity) per worker.*
  
  •*About 70% of workers do not have any insurance to compensate them in case of occupational*
  *diseases and injuries.*
  
  •*Research has demonstrated that workplace health initiatives can help reduce sick leave*
  *absenteeism by 27% and health-care costs for companies by 26%.*