Any tinfoil hat expert can claim the recent trends of increase in (fill in illness here) is a direct result of cell phone use.

The problem is no direct correlation can be found that proves this because we live in a world of so many rapid changes and the effects get lost by a host of other factors.

So is there proof of damage? Sure.

Can we isolate it to be from cell phone use? No.

Can we be sure that it is not? No.