"Glad you asked," Pitch said while patching the student back up.

"The corruption corrupts either parasitically or naturally. If the infected is away from the host, they will turn into a zombie like state, and become a cursed zombie. If the host is near the source of the disease, they will become a part of a hive mind."

Pitch takes out a syringe, he injects it into the students. "It's like cancer. I can reduce it, but not destroy it. These patients are a part of the source now, it'll grow back again and again until they're corrupted."

The student that was injected turns back to normal. Their hair is no longer black, and he sleep peacefully. "The people who have been corrupted and merged parasitically with the beast, will never be cured..."

"As for how this happened, don't worry about it. I have my story, the staff had theirs, and Jack has his. We'll all tell you different things, I doubt you'll ever understand the full origins."