article_snippet.sent: The specific symptoms that appear depend upon which part of the central nervous system is affected and the job of the damaged nerve.
article_snippet.sent: Symptoms can come and go and can vary greatly in terms of severity .
article_snippet.sent: There may be periods of relapse of varying length and severity.
article_snippet.sent: As the disease progresses, the disease produces symptoms ranging from mild numbness or tingling to full blown paralysis.
article_snippet.sent: Occasionally, it can prove fatal.