New arrivals at Helsinki airport wait in line for a free Covid-19 test by dogs. Getty Images
'Freya' detects a sample of malaria from a row of sample pots at the Medical Detection Dogs charity headquarters in Milton Keynes, England. The charity is currently working with the London School of Hygiene and Tropical Medicine to test whether the dogs can be re-trained to detect Covid-19. Getty Images
An employee releases dogs from a kennel during Covid-19 detection training at the Aeroflot PJSC canine training facility in Moscow, Russia. Getty Images
A coronavirus sniffer dog named Valo sits at Helsinki airport in Vantaa, Finland, to check arriving passengers. AFP
A dog is trained to detect Covid-19 at the Campus Bio-Medico University of Rome, Italy. Getty Images
Susanna Paavilainen, executive director at Wise Nose Association, commands one of 10 sniffer dogs trained to detect coronavirus infections at Helsinki airport in Finland. Getty Images
Members of the Bundeswehr, the German armed forces, train a dog to detect Covid-19 infections in humans at the Bundeswehr centre for dog training in Ulmen, Germany. Getty Images
A sniffer dog trained to detect the coronavirus disease works at the international airport of Santiago, Chile. Reuters
New arrivals at Helsinki airport wait in line for a free Covid-19 test by dogs. Getty Images
'Freya' detects a sample of malaria from a row of sample pots at the Medical Detection Dogs charity headquarters in Milton Keynes, England. The charity is currently working with the London School of Hygiene and Tropical Medicine to test whether the dogs can be re-trained to detect Covid-19. Getty Images
An employee releases dogs from a kennel during Covid-19 detection training at the Aeroflot PJSC canine training facility in Moscow, Russia. Getty Images
A coronavirus sniffer dog named Valo sits at Helsinki airport in Vantaa, Finland, to check arriving passengers. AFP
A dog is trained to detect Covid-19 at the Campus Bio-Medico University of Rome, Italy. Getty Images
Susanna Paavilainen, executive director at Wise Nose Association, commands one of 10 sniffer dogs trained to detect coronavirus infections at Helsinki airport in Finland. Getty Images
Members of the Bundeswehr, the German armed forces, train a dog to detect Covid-19 infections in humans at the Bundeswehr centre for dog training in Ulmen, Germany. Getty Images
A sniffer dog trained to detect the coronavirus disease works at the international airport of Santiago, Chile. Reuters
New arrivals at Helsinki airport wait in line for a free Covid-19 test by dogs. Getty Images
