I'm also torn between Emory and Columbia. Right now I am leaning towards Columbia, although I will be visiting both in the next few weeks. The CDC connection is impressive, by Columbia also has a close relationship with the NYC Dept of Health, which is a strong health dept. I think it also really depends on where you see yourself living after you finish your studies. I want to end up in NYC, and I'd love to have the chance to live somewhere totally different (Atlanta) for a few years, but I feel a little bit like I'd be shooting myself in the foot to NOT go to school/make connections in the city in which I want to live.