Multiple sclerosis on the rise in region

... quadrupled in Saudi Arabia. One possible cause is that MS increases in places where the population is deficient in Vitamin D, which humans obtain by being exposed to sunlight. The disease is more common at higher latitudes, like in Canada, Iceland ...

http://www.dailystar.com.lb/News/Lebanon-News/2013/Sep-20/231914-multiple-sclerosis-on-the-rise-in-region.ashx