I can't really see 28 DAYS LATER in this comic, to tell the truth. I haven't read the first TPB yet, but from what I could tell, it's more like DAWN OF THE DEAD, only longer. You can tell most of this spawned from a conversation about what the creators would do if they were in a situation such as that one. It's just freakin' awesome, IMO.
If you don't read this comic, you're doing yourself a disservice. Trust me.