In a previous post, we wrote that the Wall Street Journal discovered that only about half of all hotels provide air that's adequately clean. ("Don't Inhale: Hotel Air Quality Becomes an Issue With Clients")
Yes, you can travel to Miami. As of morning, March 10th, there are no know cases here. Is it that the temperatures are too high for the virus or plain luck? Hard to tell, but in any case, Miami will get its fair share.