[randcraw]

If a human can do it, a dog can too, since their noses are so much more sensitive than any human's. I can imagine dogs reliably sniffing out many diseases, then this becoming a standard lab assay, or at least a component thereof.

[nradov]

When you feel sick, go get a "Lab" test.

[adityaathalye]

And then do we query results with What's pup, doc??

[bobthepanda]

Also, assays cost less money than dogs which cost less money than human specialists.