Since theres more people in my city than me, I would hole up in a wal-mart (guns, appliances, food, etc) get some uninfected together and divise a plan to get out of the city alive and find an uninfected one. Slim chance but worth it. Also this is one thing I liked about Dead Rising it allowed you to use pretty much everything, had zombies that although too many of them were more of an obstacle, the real threats were other humans, we don't know how the human mind may work in this situation, Capcom experimented with this theory. So pretty much hold out, try to get out alive with as many sane uninfected people as possible, and if I am S.O.L. I'll make sure to make an explosive to take as much of the bastards down with me. So with this I'll give it my best shot, of course the human mind also has this little self-preservation which could fuck with my plan.