Of the 17,674 children inventoried, 991 were described as being completely unvaccinated. For each unvaccinated child, a health battery was administered.
Generation Rescue chose to use telephone interviews with parents to gather data on children, so as to closely mirror the methodology the CDC uses to establish national prevalence for NDs such as ADHD and autism through their national phone survey of parent responses. Generation Rescue chose to focus on children ages 4-17 to match the age range used by CDC.