Epidemiologists at the National Institute for Occupational Safety and Health say they've identified the largest cluster of advanced black lung disease ever reported, a cluster that was first uncovered by NPR 14 months ago.
A slide from a presentation by the National Institute for Occupational Safety and Health shows the progression from a healthy lung to advanced black lung disease.
NIOSH
HRIVELLED AND HARDENED LUNG OF BLACK LUNG VICTIM.
This image is cataloged under the National Archives Identifier (NAID) 545487.
Woodson, LeRoy, photographer/ National Archives and Records Administration, College Park
