An accident has occurred and a plague has fallen on the world. People are dying and coming back to life with only their hunger to fuel that life. It is no way to live and it certainly is making it difficult to survive. You must try to hang in there for fourty days. That is the estimated time. Until then you must set up camp and do anything you can to protect it. You must send out search parties to look for other survivors, weapons, and tools. The only thing you have to barter with is time. Sacrifice some time in order to upgrade or scout a new area.