Not to give anything away to those who haven’t seen this, but I have a few comments and a question.

First, I liked that this movie wasn’t your run-of-the-mill, ENTIRELY predictable, dumb-kids-in-the-woods-type horror. Roth has a twisted sense of humor that I quite enjoy. However, I still want to know what was the source of the problem to begin with. We know how it spreads, but where exactly did it start? Did I miss something?