Infection In missions, Contains spoilers for Jackknifed act accordingly Options

[LurkerOutThere]

So in Jackknifed one of the characters ran off alone in the darkened tunnel to get his gear while the rest were working out what to do about the truck. He was ambushed rather spectacularly by Tunnel Bob and knocked out in one go. Guess the beliefe that your the baddest thing on the block doesn't hold up well at TR6 when facing another troll, or what was once a troll. Anyway in order to prevent instant death I had Peaceman and 3V come by and interrupt Bob's meal and then pick up and stabilize the troll in question. Now my question is given the somewhat incomplete nature of the statblocks in that mission should I had him roll against infection? The infection rules are a mess but they seem to be pretty much a death sentence and that just didn't seem right.