I sort of thought it was being in proximity with somebody else with the disease, too. But as Chan says, people are clustered around Erthe without effect.
I still think we should try touching a Riftian, as that seems the most likely solution. I'm away all of next week after tomorrow so won't be able to play around with interacting with people as much as I would like, but I may try and make a Vol x Crystarius thread tonight to see if that has any effect at all :O
[ you can't stray from what you are, you're the closest thing to hell i've seen so far ]
[ use of force/magic on him is permitted aside from death/maiming ]