Makes sense! I wonder how useful that method is, given that there are (I think) big differences between place. Hospitals, cattle farms, fish farms, ... are potential hotspots of superbugs. Subway stations not so much. We already kind of know where to look for them. Expanding where we look for them would decrease the effectiveness, unless it somehow enables us to find new hotspots we don't know about.
I'm no expert, just some thoughts off the top of my head. Waiting for a real expert to explain why what I just wrote is wrong