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Fallah Yakhdani M, Abaszade Fathabadi Z, Fouladi Fard R, Salehi-Abargouei A, Ebrahimi A A. The Relationship between Multiple Sclerosis Prevalence and Density of Radon Gas in the Environment (Review). J Environ Health Sustain Dev 2019; 4 (4) :913-921
URL: http://jehsd.ssu.ac.ir/article-1-164-en.html

Introduction : Radon (Rn)  is a chemically inert gas with no odor, color, and taste. It is created from the decay of uranium in the soil and can penetrate the building through the interiors. As a result, Rn can enter the human body with the release of alpha radiation along with airborne dust and cause chronic illnesses such as lung cancer and multiple sclerosis. The Multiple Sclerosis disease, as a complex multifactor disease, is the most common widespread neurotic disorder among the young people. The purpose of this study was to collect and review the past studies published in this field since 1996.
Materials and Methods: In this review, the related articles were searched and studied using key words such as "Radon, Action, Thoron, MS, MS Disseminated, and Sclerosis" using the PRISMA statement.
Results: After reviewing the studies, several effective factors in the prevalence of MS were identified. Some of these factors were a result of the exposure to high levels of radon gas. Penetrations from the building cracks of floor, soil bed, and dwelling materials as well as the water resources are among the most important sources of Rn.
Conclusion: According to the results, the amount of Rn and it’s daughters in the environment are recognized as the risk factors for the MS prevalence.