Occupational medicine
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New York State (NYS) employees who responded to the World Trade Center (WTC) disaster on or after 11 September 2001 potentially experienced exposures that might have caused persistent respiratory effects. NYS responders represent a more moderately exposed population than typical first responders. ⋯ Our findings suggest that even in a moderately exposed responder population, lower respiratory effects were a persistent problem 5 years post-9/11, indicating that some WTC responders require ongoing monitoring.