system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In all the Zombie movies/television shows that I can think of, the number of zombies multiply. If they eat flesh shouldn't they devour people completly rather then just bite them slightly.

It just doesn't add up to me. I fee; that the number of zombies would increase as drastically as it does becasue the goal of a group of zombies should be to devour a person not bite them and therefore allow them to turn. Any insight would be greatly welcomed :).

**EDIT** I get that zombies are fictional and that its makes for a much more interesting story if there are tons of them chasing after a protagonist, my question was more focused on the justification for having the amount of zombies they do. Thanks for playing along with that idea! Your answers helped me play with the idea!!
gpt
You're right about the zombies' goals.  However, there are two competing goals at work here, the zombie's goal and the victim's goal.  While the zombie wants to eat the victim wants to survive.  Therefore even after an initial wound the victim will still try to escape.  This of course results in more zombies, although not immediately.  There is a transition period where the victim may or may not be aware of the bite before turning.  If they are aware of it then they either choose to ignore it and hope for the best or end their life rather than turning into a zombie.  When you also take into account the group mentality of people trying to survive around zombies it's easy to see how a victim who is either not aware of the wound or choosing to ignore it would be a great risk to the group.  As they inevitably become zombified they will be presented with more targets than they can effectively take down.  These situations will often lead to one or more new victims, and rarely an actual take down where the zombie can feed.  At this point the cycle repeats itself.