Disease can change body odor, and dogs have been trained to "sniff out disease" [0][1] (i.e. detect via smell) for years. Various researchers have been working on robot noses that would be able to do the same.[2] Presumably a widespread and/or less expensive version of this "robot nose" is what doku means by "AI nose sniffs out many common diseases".
lol, I do mean a sniff with a nose. The technology I'm referring to can work by taking air sample. This technology exist, the prediction is that cheap version will be available. My assumption is robots will want a digital nose, for example nanny bots will want to smell smoke and react. An example I read for this technology is that grocery store robot will want to detect spoiled food. It will be mass produced and gets cheaper. But we don't have a robot industry yet, so my confidence level on this prediction is low. The AI part of this is just data analysis of spectral lines.
I’ve never heard anyone call diagnosing “sniffing”