My Matthew is now 15. I, too believe it is related to MMR vaccine. But also, a parent may have been exposed to plastic fumes, rendering the child vulnerable. We have found many natural remedies that are helping tremendously.Matthew just got his report card. 1 C, 2B's& 4 A's!! We are thrilled. Please e-mail me if you would like more specifics. Sincerely, Janet in Ky.