Given that hundreds of millions of people live in cities like London, New York, Tokyo etc that are completely covered with thousands of mobile phone towers and

Given that hundreds of millions of people live in cities like London, New York, Tokyo etc that are completely covered with thousands of mobile phone towers and thousands more Wi-Fi networks -- not to mention radio controlled cars, baby monitors and all the other things that use the same frequencies as Wi-Fi -- EHS is remarkably rare. Really, Starbucks baristas should be dropping like flies. However, the reality is that Wi-Fi sickness or EHS is not caused by Wi-Fi, it is caused by stories about Wi-Fi. It is a Mass psychogenic illness. https://en.wikipedia.org/wiki/Mass_psychogenic_illness https://en.wikipedia.org/wiki/Mass_psychogenic_illness It's like a placebo effect, where fake pills can actually cure sick people (if they believe that they will). However, because it's the opposite effect to a placebo, it's called a nocebo. https://en.wikipedia.org/wiki/Nocebo https://en.wikipedia.org/wiki/Nocebo People really do get sick, even though there is no biological reason for them to get sick. Fortunately, most EHS victims just get the symptoms that are common to all mass psychogenic illnesses, regardless of the imagined cause: headaches (67%), dizziness or light-headedness (46%), nausea (41%) and so on. However. some nocebo's can be fatal, eg witch-doctors. Journalist training should really include information about nocebos because writing or broadcasting about psychogenic illnesses can cause psychogenic illnesses. As it is, however, almost all today's EHS sickness is most likely caused by the people who are campaigning about EHS.