I never realized poisoned weapons counted as S3 (never fought an army that used them). And I did fail to catch that in EG's post. Silly me. Anyway I don't have the BRB but the rumor source indicated that poisoned weapons gained S values. That's all I know from there. It would make sense for poisoned weapons to have an S value because if there are units immune to poison then they would become pointless. I don't know. I think it's kind of cool to have some immunity against poison so long as those weapons have a strength value. I'd imagine certain armies' veterans train themselves specifically to resist toxins and whatnot.