Assertion: multiple sclerosis's symptom | /r/HasProperty | severe
Facets:
value: very
type: DEGREE
value: in very rare cases
type: DEGREE
Source sentences:
text: In very rare cases, symptoms can be so severe and rapidly progressing as to be fatal within a short time (known as malignant or fulminant MS).
text: Doctors may still recommend treatments in some cases, such as if symptoms are very severe.