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Since 2013 hundreds of Chicago firefighters have breathed into masks as part of a study.
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BigField GEG Tech
March 3, 2017 10:05 AM
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Since 2013, O’Malley and hundreds of his fellow Chicago firefighters have breathed into masks as part of a study. The breath samples are tested by dogs trained to sniff out cancer. A raised paw means a sample is positive. “I think the dogs are detecting a cocktail of odors,” explained Glenn Ferguson, founder of Cancer Dogs. He says the dogs are catching cancer 95% of the time and often before traditional screenings.