Dogs in this use make a great way to do mass noninvasive surveillance to find infected while they are in public places where just by being in public you have consented to a dog search that has been upheld at least half a dozen times in USC Court’s and the Supremes have as well. We can’t swab everyone going into an airport but you can have dogs walking the lines and when they smell an infected person isolate them and do a second test via swab rapid ELISA or rapid pcr and get another dog as well if both dogs alert then the probability of a false positive is near zero 90% raised to 90% for a double positive is near zero probability for a false positive.
The first thing that must be understood is the fact that a person with active COVID infection must be isolated in medical quarantine until clear of th virus that much is not negotiable society has a right to isolate infectious people and the government has plenary power to do so. How you find those infected people and isolate them is up for debate but these wonderful animals and their superhuman noses just opened a way to find people in mass and with low costs and very high accuracy.
No disagreements there. Just hope they don't alert on owl! LOL