Stupid CoWorkers

At my last job, I was a do-everything. I fixed the copier when the secretary added more paper to the ventilation slots. I explained to the custodians that vacuuming the small pile of nails, tacks, and wire would actually be BAD for the vacuum. But to this day, I still have arguments with my boss over one topic. She believes that if you sit too near or too long in front of a computer, it will give you cancer. I cannot convince her otherwise, simply because HER DOCTOR told her this, and therefore, it MUST be true. What the hell is the medical profession coming too???