Answer:
They are being tested for their ability to sniff out passengers with coronavirus
Step-by-step explanation:
Given the current pandemic which has ravaged the world, scientists at the University of Helsinki are trying out the possibility of dogs being used to fish out passengers with the virus at Helsinki Airport. Dogs have a very good sense of smell and have been employed in forensics to fish out suspects or prohibited items.
The trial is based on the idea that this sense of smell of dogs could be employed to help with testing. If the dog confirms a person as having the virus, he is now taken to a laboratory where a clinical test is done.