I think something has fucked up the game's zombie distribution. Since I started playing Build 42 there's very few inside of buildings. I first noticed this when I stumbled across Ekron Community College and looked it up online and saw how people were saying there's 800 in there (I ran into maybe a dozen tops). Now I had this run where I just kamikazed into Louisville (I started on Valley Station, got bit being a moron, then just ran the barrier on a bicycle and then ran - I was a fitness instructor - the rest of the way) and it seems like any building in Louisville is deserted. Whole apartment buildings with nobody in them.