What is the environmental influence of the alexander disease?

If you don't know can you at least explain what that question means?

2 answers

It is a rare genetic disease. No environmental factors exist which cause, prevent, or slow the progress of this disease.

http://ghr.nlm.nih.gov/condition=alexanderdisease
THANK YOU SO MUCH
I <3 U for that (not literally)
u don't undesrtand , im trying to finish a huge project due tomorow and that was the last bit of information needed
you are the best