And, don't forget:

To be a true exacerbation, the attack must last at least 24 hours and be separated from the previous attack by at least 30 days. Most exacerbations last from a few days to several weeks or even months.

(i.e. any symptom occurring within the same month is considered part of the same relapse)

http://www.nationalmssociety.org/abo...ons/index.aspx

Also:

An infection with an increase of body temperature of 1 to 2 degress Celsius can also create a pseudo-exacerbation. An infection might also have an impact on the immune system, therefore triggering a real relapse, especially if not treated in time.

http://www.mswatch.ca/ContentRoot/Ed...ry/Relapse.pdf

It's taken me a lot of years and experience . . . but I think I actually "get" the definitions finally.

Cherie