>> an outbreak of a different swine flu -- >> sure. >> big vaccination campaign and led to increased incidence of a paralytic disease of guillen barre syndrome. that was very important because the epidemic never materialized. 230 cases of basic training soldiers at ft. dixon, new jersey. after that, it never came back. you had a vaccine that had small side effects and no disease. >> could that be at the root of the one-third of parents who say look we're too afraid to have our kids vaccinated. >> big anti-vaccine movement that's been going on for a long time, related to a lot of things, unfounded fears that it led to increased incidence of autism. parents don't remember horrible outbreaks of infectious diseases including measles and polio, long-since forgotten but were