I am not an EE but I do sometimes dabble in electronics. I don't seem to have any problem with EMI and I am uncertain how much it can affect people's health, as it is not something I have given much thought to, but your body can act as an antenna and this is well known to anyone who has put their finger on an oscilloscope probe and seen the mains hum on their screen. The only time I remember feeling a little weird around EMI (which could have been coincidence i.e. the immediate post-effects of exertion from physically setting up the experiment in the first place) was being close to high voltage discharges. I have been more concerned about clamping conductive interference to protect drive circuitry rather than shielding from radiated interference, and I don't have experience with creating Faraday cages for whole persons. I have to admit I am naturally skeptical about electromagnetic sensitivity, but I also previously doubted chemical sensitivities until I became sensitive to medications myself. The evidence dismissing multiple chemical sensitivity generally comes from studies involving blinded samples of odors, rather than ingesting blinded substances, so I think sensitivity to chemicals is probably real. Odor based MCS may also be real for a small proportion of people who do report symptoms but are being statistically drowned out. There is a lot we do not know about human biology. When studies demonstrate that electromagnetic sensitivity does not exist, I do not know enough about the subject to argue with the research or the experts. But other "experts" are also claiming that the activity ceiling in ME/CFS does not really exist either and that graded increases in activity are inherently safe, which I know from personal experiences, analyzing the research for myself, and anecdotes of many others, is just false and in this case the so-called "experts" are wrong and cannot be taken at face value.