Sniffer dogs trained to detect Covid-19 in human sweat proved nearly 95% accurate during training.

Six Labrador Retrievers participated in a six-month project.

"The dogs take only one to two seconds to detect the virus," Professor Kaywalee Chatdarong, the leader of the project told Reuters.

The dogs can detect a compound in the sweat of Covid-19 sufferers, even if the patient has no symptoms, the researcher said.

The dogs would not need to directly sniff people, but could screen samples of sweat, a task that should not be difficult in a hot country such as Thailand, she added.

"In the future, when we send them to airports or ports, where there is an influx of commuters, they will be much faster and more precise in detecting the virus than temperature checks," said Ms Kaywalee.