San Diego November 22, 2021 12:42 pm Dogs Being Trained to Detect COVID-19 Through Smell Humans with the COVID-19 virus can make a certain chemical that gives off an odor dogs can smell, according to Patty Unger, a retired veterinarian who works with the dogs. US & World Videos 1:12 Norway, Ireland and Spain announce they are recognizing a Palestinian state 4:08 Reba McEntire and ‘The Voice' winner Asher HaVon talk future plans 0:34 Video shows moment Milwaukee news crew witnesses hit-and-run 1:20 WATCH: School bus crashes into mobile home in South Carolina 1:13 1 dead, 30 hospitalized after plane hit with severe turbulence