Looks good to me, Dark. The only question I have, is about what time into the infection did he leave the forest and come back to the outside world? Just to keep chronology consistent.
Week 0: Lots of people getting sick. Nobody particularly gives a damn, except the news, who do their typical fear-mongering scare tactic things.
Week 1: Cases of cannibalism begin. Some news sources blame the drug "bath salts", others start talking about zombies. Civil unrest starts to increase. This is true of North America, as well as Europe.
Week 2: Cannibalism is rampant. Rumors abound of police departments suffering fatalities, as well as street executions. State of emergency declared, followed by a declaration of martial law, and the mobilization of national guard units. Curfews are enforced, camps are established, but they have little effect. Europe attempts similar measures, but has no more success. Supply chains are, for the most part, severed, as few people are bothering to go into work.
Week 3: Everything goes to hell. Guard units are taking heavy losses, moreso from "anarchists" than "infected" (Paranoia in the states; gun nuts and paranoid conspiracy theorists were convinced this was the evil plan of the New World Order, or whatever. "FEMA death camps", etc.) . It's the end of week 2, beginning of week 3, where civilization collapses. Panic, rioting, looting, complete disruption of the supply chain, orgies of blood and violence (including massive gunfights between "militias" and the Guardsmen). Communications go down (save for things like satellite phones).
Week 4: The dust settles. The country is outnumbered, 20 to 1, the undead to the still-living. Lots of power grids down, communications networks are down (satellite phones still working, of course). The game starts at the tail end of week 4.