An interesting abstract that will coming out of the upcoming AAN meeting in April:

[P08.027] Temporal Variation of Onset of Relapses in Multiple Sclerosis: Results from the Northern and Southern Hemispheres in the MSBase Registry

Without copying the entire document, they set out to measure when relapses generally occur, in 16 different countries around the world.

RESULTS: 22,684 relapses (19,775 northern, 2,909 southern) were included. Relapses were significantly more common in spring in the northern hemisphere (P<0.0001) and autumn in the southern hemisphere (P<0.0001). June had the highest number of relapses than any other month in either hemisphere (P<0.0001). These results were replicated with analysis of the 5,542 first demyelinating event in MS cases (4,801 northern, 741 southern).

Late June is already summer in the Northern hemisphere, so that follows many months of the largest amount of sunshine any of us would normally be exposed to; Mar, April, May, June . . .

Late June is early Winter in the Southern hemisphere, so that follows many months of the largest amount of sushine any of them might normally be exposed to; their late summer & fall months; Mar, April, May, June.

Sure doesn't endorse the Vitamin D deficiency theory.

Cherie