I wouldn't worry too much. We have heard so many scares over the years,eg. eggs(or fill in the guilty food or activity here) are good then bad then good then bad etc
Perhaps these things only get a run because there is enough free floating anxiety out there to latch onto them. After awhile it is all forgotten till a new one comes along and everyone worries(and drug cos and food manufacturers make money)till it too becomes stale...wash rinse repeat...
