The majority of<unk><unk>  cases are reported in northern Europe, continental North America, and Australasia, which is about one of every 1000 citizens. Factors including sunlight exposure, climate, diet, toxins, genetic factors, geomagnetism, childhood environmental factors, and infections have been proved to cause the differences in MS prevalence. MS is at least two times more common among women than men. The onset of symptoms is mostly between the age of fifteen to forty years, rarely before age fifteen or after age sixty.
Multiple sclerosis epidemiology and demographics
Diabetic neuropathy epidemiology and demographics
Parkinson's disease epidemiology and demographics
Headache epidemiology and demographics
Botulism epidemiology and demographics
Myasthenia gravis epidemiology and demographics
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Alzheimer's disease epidemiology and demographics