n previous studies the effects of Thimerosal on the risks of neurodevelop-
mental disorders in the United States was evaluated. It was determined that an
approximately two- to eight-fold significantly increased risk for neurodevelop-
mental disorders existed, dependent on the condition or symptoms examined,
following administration of Thimerosal-containing diphtheria–tetanus–acellular
pertussis (DTaP) vaccines in comparison to Thimerosal-free DTaP vaccines,
based on assessment of the Vaccine Adverse Event Reporting System (VAERS)
database. In addition, significant associations between administration of
Thimerosal-containing vaccines and neurodevelopmental disorders have been
observed based on examinations of the U.S. Department of Education
database and the CDC Vaccine Safety Datalink (VSD) database (Geier & Geier,
2003a, 2003b, 2003c, 2004a, 2004b, 2004c, 2005a).
mental disorders in the United States was evaluated. It was determined that an
approximately two- to eight-fold significantly increased risk for neurodevelop-
mental disorders existed, dependent on the condition or symptoms examined,
following administration of Thimerosal-containing diphtheria–tetanus–acellular
pertussis (DTaP) vaccines in comparison to Thimerosal-free DTaP vaccines,
based on assessment of the Vaccine Adverse Event Reporting System (VAERS)
database. In addition, significant associations between administration of
Thimerosal-containing vaccines and neurodevelopmental disorders have been
observed based on examinations of the U.S. Department of Education
database and the CDC Vaccine Safety Datalink (VSD) database (Geier & Geier,
2003a, 2003b, 2003c, 2004a, 2004b, 2004c, 2005a).