Fifty percent of people who are initially diagnosed with Multiple Sclerosis will be told they have Relapsing-Remitting MS, defined as having episodes of symptoms followed by recovery periods.
If you have benign or "silent" MS you will never experience any symptoms.
Primary Progressive MS generally happens to people in their 40's and is the only form of MS that affects men and women equally.
Within a period of ten years, 50% of MS patients who were initially diagnosed with Relapsing-Remitting MS will develop what is known as Secondary-Progressive MS.
The most aggressive form of MS is known as Marburg Variant MS and is defined by a very rapid decline into disability or even death, sometimes with weeks or months.