Dogs have superior nose power...
Their smell receptors are at least a 1,000 times more powerful and accurate than humans.
Certain trained dogs can sniff out diseases like diabetes, cancer, tuberculosis, malaria and viral infections.
During a recent study in Germany, detector dogs were trained using sweat samples from people infected with COVID-19.
The dogs were able to detect COVID-19 in infected people before they had symptoms (prior to testing positive).
And these dogs had an incredible 94% success rate overall!
How does this work? Watch this video to find out:
Maren von Koeckritz-Blickwede, the professor that conducted the study, says dogs are able to do this because the metabolic processes of an infected person "completely change".
"We think that the dogs are able to detect a specific smell of the metabolic changes that occur in those patients," she says.
This could be particularly useful at airports, sports stadiums, mass gatherings and country borders, to help prevent outbreaks of coronavirus.
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