TOPSHOT - Pokaa, a Covid-19 sniffer dog and his trainer stand next to boxes of training samples at La Roselicre EHPAD (Housing Establishment for Dependant Elderly People) in Kunheim, eastern France, on August 2, 2021. - Residents of this establishment in the region of Colmar, have already had to deal with Covid tests. But now they have Pokaa, a sniffer dog, trained to detect the spike protein that carries the virus by smell with his nose. (Photo by SEBASTIEN BOZON / AFP)