Ravi gives Frank a wary look, because the trouble is he's not a genius. He's good at his job and clever, but he's been struggling to run his experiments with the rats. "If we were home and I had a full lab, then no problem," he admits. "I could test it, replicate versions, work with rats and develop something."

"Here?" He shakes his head. "Probably not much luck. I haven't even got a centrifuge, let alone half the equipment I'd need." It's why there are three zombies running around with no cure and no vaccine, because Ravi genuinely can't make anything work with the limited resources.