We find similar evidence when researching the pertussis vaccination, supposed to prevent whooping cough, a disease that is potentially fatal to infants. The vaccination for pertussis was first introduced in 1936, and most health professionals say this was the reason for the decline in pertussis cases. However, the number of these cases had been rapidly declining since approximately 1900, and according to Dr. Gordon T. Stewart, head of the department of community medicine at the University of Glasgow, Scotland, "The decline in pertussis mortality was 80 percent before the vaccine was ever used."
http://www.juiceguy.com/Vaccination-is-it-dangerous.shtml
Just an example of the information you could find on the CDC website, if you look long and hard enough is in 15 years (80-95) there were 15 deaths from pertussis. In 1998 alone, there were 17 deaths the day after the pertussis vaccine was given. Gee, is everything they tell you the whole truth? You do the math, is it worth the risk? As a mother I would rather take the 92 in 15 years, than 17 in 1 chance. Here’s another statistic for you in 2003, 120 cases of pertussis were reported in Fon du Lac Wisconsin. State public health department said the county had 99.99% vaccination rate. So if everyone did the right thing and got the vaccination, why were 120 cases reported?
http://www.responsibilityproject.com/blog/post/needling-questions-immunizing-kids/