. >> narrator: barbara loe fisher runs an independent watchdog organization dedicated to vaccine safety issues. >> national vaccine information center. >> narrator: it's an organization she helped found in 1982 after her son suffered a serious vaccine side effect. >> to make a long story short, after that, he regressed physically, mentally and emotionally and became a totally different child. he was eventually diagnosed with multiple learning disabilities and attention-deficit disorder and had to remain in a classroom for the learning disabled throughout his public school. >> narrator: fisher's organization lobbied successfully for laws that promote vaccine safety. today, a much safer vaccine has replaced dpt. the laws also created a special vaccine court to evaluate and compensate victims of adverse vaccine side effects. >> vaccines are pharmaceutical products that inherently carry a risk of injury or death. and that risk can be greater for some than others, particularly for... for genetic or biological high-risk reasons that have... some of which have been identified and some which ha