Some countries and organizations already recognise environmental sensitivities/MCS as a disease and/or disability:

The World Health Organization (WHO) acknowledges the condition of electromagnetic sensitivity, and published a 2006 research agenda for radio-frequency fields. ⁱ

WHO and the ICD-10 Classification - click here to read

Click on each country for futher details about recognition in these countries:

Canada
Germany
Denmark
Sweden
United States
Japan

ⁱ World Health Organization. 2006 WHO Research Agenda for Radio Frequency Fields. World Health Organization
2006. http://www.who.int/peh-emf/research/rf_research_agenda_2006.pdf