This guy probably got it from a leaky container somewhere he had been. Since it was airborne, maybe as he was going down the hwy. following a transport vehicle, or they're storing it somewhere in his neighborhood where the wind would pick it up. They ought to be trying to locate the source. Since he was 63, it wouldn't take much to infect him. If there's no other cases in NC, or along the route, it's probably in his neighborhood, or nearby.