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A German veterinary clinic has trained sniffer dogs to detect coronavirus in human saliva samples - with 94% accuracy, Sky news reported. 

The dogs are conditioned to pick up the "corona odour" that comes from cells in infected people, said Esther Schalke, a vet at Germany's armed forces school for service dogs.

Filou, a three-year-old Belgian Shepherd, and Joe Cocker, a one-year-old Cocker Spaniel, are two of the dogs being trained at Hanover's University of Veterinary Medicine.

"We did a study where we had dogs sniffing samples from COVID-positive patients and we can say that they have a 94% probability in our study... that they can sniff them out," said Holger Volk, head of the veterinary clinic.

Stephan Weil, premier of Lower Saxony said he was impressed with the study and called for feasibility tests before the sniffer dogs are put to use in everyday life, such as on people attending concerts.