Is the epidemic in 2012 going to be because of the poles switching places?

I wouldn't get too worked up about 2012. The root of all these rumors is that it is simply the end of the Mayan calendar system (actually 3 overlapping calendars). While they were a very advanced race in their day, you will notice that they are no longer around as a nation. If they were truly so adept at prediction, I think they probably would have fared a little better historically.