Dr Yael Stein, MD, Department of Anesthesiology and Critical Care Medicine, Hebrew University – Hadassah Medical Center, Jerusalem, Israel, gave an 83 slide presentation titled “Environmental Refugees” wherein Dr Stein pointed out key factors that need to be addressed in the modern age of microwave technology that super saturates humans with EMFs and RFs from cell phones and towers, Wi-Fi, utility companies’ AMI smart meters, smart phones, routers, monitors, etc. and other electronics that can send and receive data, information, voice, photographs, etc.
Dr Stein’s comprehensive presentation was before the UNESCO 10th World Conference on Bioethics, Medical Ethics and Health Law held January 6 to 8, 2015 in Jerusalem, Israel. 
One very prominent classification regarding EHS, pointed out by Dr Stein, is that in Sweden, electromagnetic hypersensitivity (EHS) officially is recognized as a functional impairment and not regarded as a disease! Furthermore, there’s a published peer-review paper, “Electrohypersensitivity: state-of-the-art of a functional impairment”  wherein Sweden’s position on EHS is discussed. The Abstract for that paper states:
EHS is characterized by a variety of non-specific symptoms that differ from individual to individual. The symptoms are certainly real and can vary widely in their severity. Whatever the cause, EHS can be a disabling problem for the affected individual.
Source: Dr Yael Stein, MD, Slide 67 of 83 / UNESCO 10th Word Conference on Bioethics, Medical Ethics and Health Law