Quote Originally Posted by Big D
Quote Originally Posted by Aralith
You're missing one key point. The reason that Cloud had Geostigma in the first place was because the Jenova cells in is body had become inactive. This is not stated in the movie, but a logical deduction since he had no other chance to come in contact with Jenova cells and neither Jenova nor Sephiroth had been utilizing Cloud's unique abilities for two years (i.e. being able to control him). So it would be fair to say, that since Geostigma is a fatal, crippling disease, the lack of the inactive Jenova cells causing it would make him stronger. Plus a bit of adrenaline and some serious determination.
Hmm... I'd disagree. Cloud's Jenova cells are still alive and kicking; his superhuman strength and abilities prove that. Geostigma is just a biological reaction against the cells' presence.
If the Jenova cells in his body were still active and he still had Geostigma, why wouldn't he have contracted it during the events that take place in the game. He still had Jenova cells injected into him, and yet no Geostigma. Remember, Jenova was even reawakend in the game (to an extent) by Cloud's presence. Unless you think it was just a coincidence.

Anyways, all I'm trying to say, is that as long as Jenova cells are active (i.e. being used to control you in Cloud's case), then you're safe from Geostigma. If not, as in the movie when Cloud had not been being controlled for two years, then Geostima presents. Once again, never stated anywhere, just my own theory. You don't have to believe it, but it makes pretty good sense to me.