kramwest1
has a
Just, I suppose a forewarning of sorts, in the comics that it's based on there has never, at least yet, been an explanation of what really happened to start it all, no government/military involvement etc and it's always just focused on the group dynamics and their multiple attempts at restarting their lives and the other groups they come in contact with.
That said they have veered from the comic's story a good bit with the disease research place in the last series.
I've been wondering that. I'd read the comics (graphic novels), but they are damned expensive.