What is the Longitudinal Exposure Record (LER)?

• A. A comprehensive record of all occupational and environmental exposures over a full working lifetime
• B. A summary of risks for the next year
• C. A log of only chemical exposures
• D. A record of injuries

Answer: (A)

The Longitudinal Exposure Record is a complete, time-stamped history of what a worker has been exposed to across their entire career, spanning all occupational and environmental settings. It goes beyond a single-year snapshot and tracks exposure types, intensities, and durations over many years and jobs to build a cumulative picture of a person’s exposure burden. This broad, long-term view supports meaningful health risk assessment, surveillance, and research by allowing analysis of how cumulative exposures relate to health outcomes over time. It should cover a wide range of factors—chemical, physical, biological, and environmental exposures encountered at work and outside of work—not just one category. It is distinct from a log of injuries, which records events that happened rather than the exposures someone experienced.