I cannot find anything definitive. One source says that after smoking around 70-80 degrees to bring the heat up to 150 for 30 minutes to kill any bacteria. UC Davis says to freeze them at -10 deg for a week but quickly adds that most home freezers don't go this low. That's real helpful. Some other sources make no mention of a problem, but if there are fish, regardless of the cure, exposed for more than 2-4 hours at 80 degrees I'd be concerned. I've done lox but in less than 2 hours so no worries. What say the experts?