"No. I fix people. I have to get to the Hospital. Right now that's the only place I can think to finding the cure. There has to be a cure." It was a disease, and eventually diseases would have cures. Simon's mind was already working through Hannibal's log book; something had to be there. If Hannibal was there, the two doctors could find and answer, and then Simon would deck the asshole for trying to be god.
"I can't fix it. I can't...the only way I can help them is to find a cure. I'm sorry." He was saying it to the people in the bus as much as the man beside him. "Get me to the Hospital. I bet there are people there who can help."