After Tomorrow: I Can Carry the Disease

When he woke up, Xu Xian tragically discovered that he had time-traveled into the background story of a doomsday zombie game - "The Day After Tomorrow". What's even more tragic is that it even wore it on the final villain boss. How to fix this? Are you just waiting for the protagonist group to come and destroy you and save the world? Etc! This timeline... Xu Xian was surprised to find that the time he traveled through seemed to be before the villain's boss turned black. What's even more surprising is that the system is also awakened! Bite! The system has started...] Traveling to a wasteland world where zombies are rampant, but the disease transportation system is activated? What kind of divine expansion is this? … In the previous story background, I wanted to be a good person. But in the current backstory, I am the savior!