Labrador sniffing dog "Lotta" searches for a sample at the training site for sniffing dogs of the German Army (Bundeswehr), in Daun, Germany July 24, 2020. The Bundeswehr sniffing dogs school and the veterinarian university of Hanover are developing a training program to sniff out the coronavirus disease (COVID-19) with dogs at airports, border crossings and other highly frequented places. REUTERS/Wolfgang Rattay