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Specialized Vaping/Cigarette Detection : Algorithms distinguish between cooking smoke and tobacco/vape aerosols

When asked about the decision in deposition, Karrh said that at that point in time, we saw no substantial risk, so therefore we saw no obligation to report. Not long after the decision was made not to alert the EPA, in 1981, another study of DuPont workers by a staff epidemiologist declared that liver test data collected in Parkersburg lacked conclusive evidence of an occupationally related health problem among workers exposed to C-8. Yet the research might have reasonably led to more testing

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Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health, 1998