The Influence of Vaccine-Critical Websites on Perception of Vaccination Risks
Last year the university of Erfurt ran a study where www.impfschaden.info was compared with a pro vaccine website of the government. That is what they wrote in the conclusion:
Our analyses reveal that viewing typical vaccine-critical websites for only five to ten
minutes increases the perception of risk regarding vaccinations and decreases the perception
of risk regarding the omission of vaccinations as compared to visiting a control site.
Moreover, acquiring information about vaccinations on a vaccine-critical website
significantly decreased the intentions to vaccinate.
You can read the whole study http://www.cornelia-betsch.de/Betsch%20et%20al%20vaccination%20risks.pdf