Autism Research Paper

I have to do a story on page 7 of 10 autism research and I can not come with a good thesis statement.

http://www.autism.com/

The reality is that autism has many levels of severity. So my choice for an introductory statement indicating the differences in behavior to known levels of severity, treatment modalities that appear to be more effective at each level, and while the cause of autism remains a mystery, research includes positive behavioral change, has been fairly successful.