The research, carried out by professionals from the University of Pennsylvania School of Veterinary Medicine's Working Dog Center, found that dogs can be trained to identify saliva and urine samples of patients who tested positive for COVID-19. However, there is a certain concern for training such dogs, because since the ultimate goal would be for them to detect COVID-positive patients in a public setting and not from such samples, such training would be dangerous, as they would need to be trained around people who have tested positive for coronavirus. In fact, the use of sniffer dogs to detect coronavirus in...