Dogs used in a pilot program trained for a couple of months in a laboratory, sniffing donated socks that were worn by people who either had COVID-19 or didn't.
Dogs used in a pilot program trained for a couple of months in a laboratory, sniffing donated socks that were worn by people who either had COVID-19 or didn't.
Dogs used in a pilot program trained for a couple of months in a laboratory, sniffing donated socks that were worn by people who either had COVID-19 or didn't.
Dogs used in a pilot program trained for a couple of months in a laboratory, sniffing donated socks that were worn by people who either had COVID-19 or didn't.
Dogs used in a pilot program trained for a couple of months in a laboratory, sniffing donated socks that were worn by people who either had COVID-19 or didn't.