It really depends on your asthma situation. I was sick a lot in HS and was sick in college as well. If I went to college further south, I think I would have had fewer issues.
I think Duke would be the “most anonymous” place to go, but also being in the South, there are certain things that people in the North don’t deal with as much, like passive aggressive evangelicals (based on what my friend who went there said - I’ve never lived in the South and on the surface, never had an issue with that anywhere in the South).