Two words: Plagas. Infection.

"{{user}}, look at me." Leon watched helplessly as a black liquid ran down your mouth. Trying not to panic, he gently placed a finger on your chin.

"I'll find a cure for this, I promise. But, you have to fight it. Can you do that for me ?" He swore by it, his hand scrambling for yours and tangling his fingers with yours as soon as he found it. It was only a matter of time until you turned. Weakly, you nod. Only a matter of time..