My son repairs and installs electronic equipment in Hospitals, clinics,like MRI, X-ray, Processors, etc.
when I told him I was carrying my CELL PHONE around in my HIP POCKET, he assured that there has been plenty of facts, that women that tuck their cell phones down into their busom ,(yeah, they really do) turn out to have cancer in that exact spot if they have cancer of the breast!
I asked, "What if I put aluminum foil between the phone and my butt." He laughed and said , "Don't the RFIDs come thru metal buildings when you shop? Why do you THINK a piece of tin foil would block something that is strong enough to penetrate HEAVY METAL BUILDINGS?"
Source: X-RAY ENGINEER'S mother