"Carriers" (2009) is easily one of the best post-apocalyptic films. The story involves four youths in Southwest USA seeking sanctuary from a lethal virus that has wiped out much of the population and continues to do so. To all intents and purposes Government no longer exists and society is now a world without laws. To survive, they live by a set of rules of their own making: Avoid anyone with the disease, trust no one (not even your friends/family), immediately sterilize anything a carrier touches and realize that anyone with the disease is already dead.