The National Institute for Occupational Safety and Health (NIOSH) is recommending precautionary interim measures for reducing work-related exposures and assessing potential risk. This has been published in Current Intelligence Bulletin 60: Interim Guidance for Medical Screening and Hazard Surveillance for Workers Potentially Exposed to Engineered Nanoparticles. According to the executive summary:
Concerns have been raised about whether workers exposed to engineered nanoparticles are at increased risk of adverse health effects. The current body of evidence about the possible health risks of occupational exposure to engineered nanoparticles is quite small. While there is increasing evidence to indicate that exposure to some engineered nanoparticles can cause adverse health effects in laboratory animals, no health studies of workers exposed to the few engineered nanoparticles tested in animals have been published. The purpose of this document from the National Institute for Occupational Safety and Health (NIOSH) is to provide interim guidance about whether specific medical screening, including performing medical tests on asymptomatic workers, is appropriate for these workers.
Link -- http://www.cdc.gov/niosh/docs/2009-116/
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