We Don’t Know What Dogs Smell, or What Makes a Positive Covid-19 Sample Different
Although we know that dogs are detecting the volatile organic compounds specific to covid-19 infection, it’s not entirely clear what they smell, or what makes a covid-19 positive sample different. Chaber and Hazel say that considering that the volatile organic compounds given off in sweat samples are a complex mix, it’s likely the dogs are sniffing out a particular profile instead of individual compounds.
