A decade after the 9/11 terrorist attacks, many of the human first responders are still grappling with serious respiratory issues, while their canine counterparts have bounced back and many have even lived longer than typical search-and-rescue dogs, according to a study from the University of Pennsylvania School of Veterinary Medicine. The research shows the dogs are not developing such issues with their lungs or sinuses, a surprising find, according to study lead Dr. Cynthia Otto.

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