I do think something is going on because there seems to be an influx these days of ordinarily healthy people coming down with parasitic hyperinfections. Something in the air maybe, heavy metals or something like GMO's contributing to this problem.
I was just reading an article about a woman in Arizona who had a large worm removed from her head. She had frequent left arm and chest pain before they discovered it. In the article they blamed it on a change in the population.