""It's indisputable that (autism) is on the rise amongst children, the question is what's causing it. And we go back and forth and there's strong evidence that indicates that it's got to do with a preservative in vaccines."
-- John McCain
"I believe Americans should know must know the health effects that caused by the presence of mercury in vaccines. I will also support an examination of the National Vaccine Injury Compensation program, a program designed to compensate those injured by vaccinations."
-- Barack Obama
"We don't know what, if any, kind of link there is between vaccines and autism - but we should find out. The lack of research on treatments, interventions, and services for children and adults with autism is a major impediment to the development of delivery of quality care."
-- Hillary Clinton