She is the cure

After they recovered from the initial shock, Darius, Lucifer, and Lucian get down to the problem at hand.

They are trying to figure out, how Lucian recovered. They wanted to know that the infection just reduced itself or it is something else.

They walked into the basement, where a lot of infected vampires are locked away. But none of them are showing any signs of recovery. They are all looking the same. Unfocused gaze and hungry-looking eyes.

There is nothing in their eyes that shows they are recovering. 

"It just seems to be me. They look the same. How did this happened?" Lucian murmured absentmindedly.

"We are thinking the same. You recovered just like that" Darius agreed.

"Is it because you are a master vampire?" Lucifer expressed his doubt.

Lucian thought about that possibility for a second before he crossed it off.

"No, it's an infection. It might be slowed down inside my body. But it will not magically disappear like