IN 1999 ,FDA REPORTED THAT ETHYLMERCURY WAS PRESENT IN SEVERALS VACCINES MANDATED FOR INFANTS AND TODDLERS,THAT ANNOUNCEMENT CAUSED SEVERAL PARENTS OD AUTISTIC CHILDREN TO REALIZE THAT INJECTED ETHYLMERCURY MAY HAVE A CAUSED THEIR CHILDREN'S REGRESSION.OTHERS STUDIES IN YEAR 2000 FOUND THAT EARLY EXPOSURE TO ETHYLMERCURY WAS INDEED ASSOCIATED WITH AUTISM SPECTRUM DISORDERS INCLUDING ADHD,TICS, AND AUTISM,ONE STUDY FOCUSED UPON COMPARING TRAITS AND PHYSIOLOGICAL ABNORMALITIES COMMON IN AUTISTIS CHILDREN'S AND IN VICTIMS OF MERCURY POISONING.ACCORDING TO THE EPA AND THE AMERICAN ACADEMY OF PEDIATRICIAN,FULLY VACCINATED CHILDREN,WHITIN THE FIRST TWO YEARS RECEIVE A POTENTIALLY NEUROTOXIC QUANTITY OF HG.