The Chosen One and the Apostle

During an experiment, scientists unfortunately leaked a deadly virus. But what is surprising is that instead of dying, the creatures infected by this virus turned into a science fiction creature without any consciousness-the undead. Although the virus infected most living things, there are still some human beings who survived for some special reasons, and a very small number of people have something that ordinary people do not have - a system given by God, and these people are called "apostles"; while another group of survivors formed an organization "The Chosen One", all of whom have unique antibodies that are immune to the invasion of the virus. In order to exterminate the undead and seize power from within, the two groups of survivors ostensibly cooperated to fight against the enemy, but in fact they were constantly fighting. In such a world, how should the surviving people survive?