Statute of Limitations
The status of limitations starts from when you are aware that something has caused you injury - at least, that's what I was told by a lawyer when I was looking into some issues because a doctor completely screwed up my eyesight.
So - unless she just now had someone tell her that inhaling all that stuff at AMD was probably not good for her, I'm not sure how this is going to work. You usually have one year.
As someone above said, perhaps it is the child who is actually "suing" - with the mother as the representative, though the wording of it leads me to believe its the mother.
It says she had to get treatment for exposure twice. I'd think - though I'm not a lawyer - that the clock might have started then, or when the child was born.
It really, truly sucks that a child was born with such devastating problems - I certainly have sympathy. And I sympathize with the mom, for it is a challenge to raise children with mental disabilities. However, I think she would have had a better chance 15 year ago, when the kid came out missing a limb.