NIH.gov link on my NoMoreTowersInTheOzarks.org site shows the NIH considers EHS to be a "world wide plague that began when technology was launched on an industrial level". They also report 1/3 of the US is adversely affected, 3% severely.
National Institute of Health-NIH.gov EHS=Electromagnetic Hypersensitivity “Prevalence of EHS occurrence is estimated to range from 0.7% to 13.3%, mainly affecting about 3% to 5% of the population in many countries, meaning that millions of people may in fact be affected by EHS worldwide… the increase in EHS prevalence is not restricted to a single country but is presently a worldwide plague, which started as soon as these industrial technologies became widespread." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7139347/?fbclid=IwAR1DrLjrNl-Am9mUaaq-8MiGyL7pAPl_y8SJDMpi635548J6MP0IhrsXFgQ
Researchers Hallberg and Oberfeld studying the growth rates of electrohypersensitivity cases, predicted that by 2017, 50% of the population will display such symptoms.
https://www.elettrosensibili.it/2016/01/24/electrohypersensitivity-what-you-need-to-know-about-the-allergy-of-the-21st-century/
It could be higher now, likely is but we're waiting for the doctors and patients to realize while they're all holding a cell phone.