A sniffer dog is trained by a French firefighter to detect the coronavirus in Libourne on January 29, 2021 as part of a joint operation between the Bordeaux CHU and the CEVA animal health company to provide a method enabling the use of trained dogs i PARIS - It turns out man’s best friend may be one of the best ways to detect COVID-19 in humans according to a new French study.Scientists at The National Veterinary School of Alfort published their findings Wednesday saying the ability of dogs to detect the coronavirus in sweat from people was "very promising."The study was conducted from March 16 to April 9 in France and looked at two different tests to detect COVID-19: a nasopharyngeal swab and the canine olfactory test.