...vaccinations. Several complained about patient backlogs caused by parents stirred up by information of dubious scientific merit, according to the CDC report. Questions commonly center on autism and the fear it can be caused by the mercury-based preservative that used to be in most vaccines. Since 2001, the preservative has been removed from shots recommended for young children. Brown said she wrote a 16-page, single-spaced document for parents that explains childhood vaccinations...