Coronavirus-sniffing dogs deployed at Miami Airport to detect virus in employees

Nature News, in November 2020 ( https://www.nature.com/articles/d41586-020-03149-9 ) says : "Canines seem to detect coronavirus infections with remarkable accuracy, but researchers say large-scale studies are needed before the approach is scaled up."

Hmm, bit skeptic of this. Did the studies control for regular corona viruses? From that old article last year, it says:

> “With covid detection, you are not recognizing the virus,” Suslick said. “You are recognizing the volatile byproducts of cells dying because they have been infected with the virus.”

So hopefully the dogs are trained to know the difference, or maybe they can work in conjunction with other tests? Also, if they eventually get rewarded for it, how can the dogs not associate the reward with the positive detections?

A breath test would probably the most ideal technology.

What ever becomes of the dogs once this trend passes?