Question (Spoilers)
Did Marcus drink any of the contaminated water at the end? We see him open the cap but never drink from the bottle. We know Camila is infected because we see her guzzle the water and she instantly breaks out but not Marcus.
Also, was this supposed to be a prequel to the first Cabin Fever, seeing as how it deals with Patient zero? Does Porter make his way to the woods where the first movie takes place?