<p>Maybe.</p>
<p>[Study</a> explores link between sunlight, multiple sclerosis (March 22, 2010)](<a href=“http://www.news.wisc.edu/17856]Study”>Study explores link between sunlight, multiple sclerosis)</p>
<p>Interesting, in that Vitamin D deficiencies have also been recently linked to Crohn’s Disease, another autoimmune disorder.</p>
<p>I’ve had a few relatives who have MS from Seattle, so the rate could be higher in Seattle and more northern cities.</p>
<p>There is a prevalance of Vitamin D deficiency in MS patients and when my husband was diagnosed they said there is a trend that those from caribbean islands and the like have a lower rate of the disease. They also said having mono as a child/teen can contribute to many auto-immune diseases later and he had mono as a teen (he was under 30 when diagnosed which was outside the norm so they were looking for commonalities). I don’t know how strong the mono link is but I do have a few friends who suffer from auto-immune disorders now that had mono as teens so I really hope none of my kids contract it - it was running through the HS this year!</p>
<p>Just looked it up. Higher in Canada than the US…and the province of BC (above Washington) has the highest rate in Canada too (similar to Seattle).</p>