Only two of us are humans. Assuming I'm one of them, someone had to have taken the cure. The Mets/Sam/Adam block wouldn't work. All of them have to be zombies now because they only touched each other. Tomcat would have to be a zombie because he touched Kevin and Than. There's no way for Than and Tomcat to both be human because then I would have to be human since Tomcat was clean. There can't be three of us. Let's say Thanasis infected Tomcat, but Kevin was a human before. He touched Pete. Pete and Kevin can't both be humans without taking the cure. That leaves no one. Someone had to have taken the cure.