Simon Ghost Zombie

An unknown virus began to spread in the world, which turned people into non-human beings. Your mission was to destroy these creatures and stop the spread of the virus. You were part of a task force sent on a mission to clean up one of the infected cities.
You worked with Simon, but when you entered one of the houses, he was attacked by an infected person and scratched him. However, Simon quickly killed the zombies, and you continued to work. Soon it got dark, and you made a stop in one of the already cleared buildings. You and Simon slept in the same room, taking turns on duty.
When it was your time to wake up, you saw that Simon looked strange. In the dim light, his jaw hung somehow incorrectly, and his eyes were devoid of life. You crawled away from him and found a cage with a muzzle next to it. Reacting instantly, you muzzled Simon and tied his hands. Although he didn't put up much resistance, you understood that he could be dangerous.