Vaccine-Induced ADHD


Attention-deficit/hyperactivity disorder or attention deficit disorder (ADHD, ADD) affect up to 1 in 10 children in the US.  The condition is characterized by inattention, impulsivity and hyperactivity. This behavior can have a significant impact a child’s performance at school and at home.  In many children, symptoms of ADHD may persist through adolescence and even into adulthood.

Dr. Kenneth Bock states in his groundbreaking book Healing the New Epidemics that “ADHD is basically just the mildest form of symptomatology that is found on the autism spectrum.”[1] Both disorders, he contends are similar neurological manifestations of a wide variety of related problems. These include toxicity, bowel dysbiosis and allergic reactions.

First identified as a psychiatric disorder, ADHD was attributed to social or cultural differences.[2] Today, mainstream medical literature points to a genetic explanation for the condition.  However, as prevalence of ADHD skyrockets, a genetic explanation has become harder to support.  The CDC estimates that ADHD in US children has climbed from 7.8% in 2003 to 9.5% in 2007.[3] This is a 21.8% increase in just 4 years. Genes do not change that quickly.

The epidemic rise in four childhood disorders today – autism, allergies, asthma, ADHD – would point to similar roots of causation.  In fact, they are co-morbid disorders.  For example, most children with ADHD or autism also have allergies. The question becomes then, what are those common causes? Bock points to four catastrophic changes in the lives of children: toxins have proliferated, nutrition has deteriorated, the ability to detoxify has dwindled, and vaccinations have increased.

Documents obtained through the Freedom of Information Act show that Phase 1 of the CDC Thimerosal VSD Study [4] found that there was increased risk of developing ADHD with cumulative exposure to thimerosal containing vaccines (see graph below).  Further, the lead author of the Thimerosal VSD Study indicated that the correlation in the Phase 1 results between increased neurological disorders and the vaccines could be found for aluminum in the vaccines as well as for mercury in the vaccines.[5]  In a different study reviewing the VSD data, “consistent significantly increased rate ratios” were observed for neurodevelopmental disorders including attention deficit disorder with mercury exposure from thimerosal containing vaccines.[5]  Although these findings were not included in the final publication of the Thimerosal VSD study, they warrant further research into whether vaccines contribute to ADHD.

Increased risk of ADHD associated with cumulative thimerosal

From Thomas Verstraeten, Robert Davis, Frank DeStefano, Thimerosal VSD study, Phase I, Update 2/29/00, Confidential Report, CDC, Feb. 29, 2000.[4] This chart shows that higher cumulative mercury from vaccines was associated with higher risk of  Attention Deficit Disorder




[1] Kenneth Bock, Healing the New Childhood Epidemics, Autism, ADHD, Asthma and Allergies (NY, Ballantine Books, 2007) 101.

[2] S.V. Faraone, et al., “The worldwide prevalence of ADHD: is it an American condition?” World Psychiatry, 2, 2 (June, 2003): 104-113.

[3] and

[4] Thomas Verstraeten, Robert Davis, Frank DeStefano, Thimerosal VSD study, Phase I, Update 2/29/00, Confidential Report, CDC, Feb. 29, 2000.

[5] Transcript from “Scientific Review of Vaccine Safety Datalink Information”, June 7-8, 2000, Simpsonwood Retreat Center, Norcross, GA

[6] H.A. Young, D.A. Geier, M.R. Geier, “Thimerosal exposure in infants and neurodevelopmental disorders: An assessment of computerized medical records sin the Vaccine Safety Datalink,” Journal of the Neurological Sciences, 271 (2008): 110-118.