Like increasing numbers of people, Mary believes she suffers from electromagnetic hypersensitivity intolerance syndrome (EHS) — in other words, she thinks the electronic devices most of us rely on in our everyday lives are making her ill.
Up to 5 per cent of the population — more than 3 million people — believe they are affected by some degree of electro-sensitivity, an allergy to the radiowaves and microwaves emitted by devices.
These range from mobile phones to television screens and even light bulbs. The waves are a form of non-ionising radiation, designed to be too low in frequency to affect people.
However, EHS sufferers believe this low-level radiation is capable of causing harm, and report symptoms ranging from headaches, lethargy and nausea to breathing difficulties and even paralysis. They also fear the radiation may cause cancer, autoimmune diseases and neurological disorders in the long-term.
But apparently, regular daylight which has frequencies in those evil spectrum do not harm her…or GPS or amateur radio or Sirius radio or microwave ovens or a whole bunch of things that play on those frequencies.
If she was really serious about avoiding the evil waves, maybe she should wear chain mail from top to bottom as it would be a portable version of a Faraday Cage.