Rabid World #1 (Of 4)

It was like any other morning, until it wasn't. Growing from the rural areas, it was a simple dog bite, but at the end of the day civilization was collapsing. The outbreak left people rabid, devoid of their humanity, left only with a violent rage. When an outbreak of a rabies-like virus devastates the world, it's a fight for survival in a world gone mad. Two couples set off on disparate courses, one for survival and one to save the world. Will a vaccine be found? Will the survivors make it to a safe place to hole up?