This final report responds to congressional concerns about allegations regarding conflicts-of-interest that could affect the credibility of a study of adverse consequences of pertussis and rubella vaccines. Our review identified conflicts-of-interest for two committee members. One individual was employed by a gateway.html fund that was fully supported by a DPT manufacturer. Another resigned after the Institute of Medicine Study learned that the person had made public statements in a legal deposition on the effects of DPT vaccines. We also found that NIH failed to assure the impartiality and objectivity of work performed under this advisory and assistance contract.