[Thufir]

Originally posted by Norfleet:
Yes. If you are not cold-blooded, or, with the latest patch, have Swamp Survival, you have a chance of being diseased. You might also be diseased anyway, even if you are undead, demon or lifeless, but it won't have any effect on you if it happens.

I hadn't thought of undead/demon/lifeless options, so that does loosen the constraints on Pretender choice. Thanks for the info!