Scientists still don't know what causes multiple sclerosis (MS). It could be viruses, genetics or environmental factors, or a combination of all three. One new study suggests it
could be the kind of work people do.
The results of that study showed that dairy workers in a certain Danish population had higher rates of MS than people in other lines of work....... Read More - http://www.ms-uk.org/index.cfm/environmentalfactors