The sad thing is that we didn't really get a sense of it. In fact, we don't get a sense of the wider world in Bryan's movies... it's his style to present intimate, small, closed settings... the X-Men were in a bubble. In X2, Storm says to Nightcrawler that they live at the school 'to be safe from everyone else' and that supports Bryan's thinking that the X-Men exist very separately, not integrating at all, despite Xavier's dream of peaceful co-existence.
I think a newspaper headline or something in the movie might have helped get across the point of the huge effects of Xavier's Cerebro mind-wave. When in his office at the end, Xavier should have been putting down a newspaper whose visible headline said something like:
Billions hit by global outbreak
Hundreds dead, scientists baffled by mass seizures
Virus weapon and solar radiation storm among theories