We now know that MS is not infectious in the true sense of the word. It is not contagious in the way, say, the flu is. But infection does likely play a role in MS.

We now know that MS is not infectious in the true sense of the word. It is not contagious in the way, say, the flu is.
But infection does likely play a role in MS.https://t.co/DG9KJQEVBV

— NPR (@NPR) January 21, 2019