Dogs trained to detect prostate cancer with more than 90% accuracy | Society | The Guardian

The Guardian had an article by James Meikle that described an experiment done in Milan Italy using dogs to detect prostate cancer.  This experiment seems to prove that it will be possible to detect prostate cancer using smell.  Yes, it would be good to train dogs to detect disease.  That could be a lot better than many of our current medical screening systems.
Dogs trained to detect prostate cancer with more than 90% accuracy | Society | The Guardian

There have also been tests demonstrating similar capability to detect lung cancer using smell. (see this link)  If we can build an electronic "sniffer" that can discriminate the various scents (see this link), we may be able to use it to diagnose many other diseases, in addition to cancer.  The world needs a simple, low cost, non-invasive screening system to identify diseases while in the early stages.  It could also help for maintaining quarantines, since it would provide a quick screening technique to use at borders.

I sure hope that governments are providing adequate incentives to accelerate this technology. It appears that NIH is participating this test in Israel.   If such a device could be built to reliably screen for many types of diseases using only smell, the overall cost of medical care in the world would go down, and the quality of health could go up, because of more accurate earlier diagnosis.