Workers' Memorial Day, April 28, 2001, is a designated time to remember workers who have died from work-related injuries or illnesses. Although there have been substantial improvements in occupational health and safety, work-related injuries and deaths continue to be a major public health concern. During 1980-1997, 103,945 workers died from work-related injuries, an average of 16 deaths per day. In 1999, the most recent year for which data are available, economic costs of fatal and nonfatal unintentional work-related injuries were an estimated $122.6 billion. This year, the date also marks the 30th anniversary of the Occupational Safety and Health Act and the establishment of the Occupational Safety and Health Administration and CDC's National Institute for Occupational Safety and Health (NIOSH). NIOSH was established to conduct research and make recommendations to prevent work-related injuries, illnesses, and deaths. Additional information on causes and prevention of work-related injury and illness is available from the NIOSH website.