At 07:55 AM 02/07/2001 +0000, you wrote: >On Wed, 07 Feb 2001, David Lewandowski wrote: > >> They went on to claim that "exemptors" put the public at >> risk because 11% of those who got the measles got them from an "exemptor". >> Think about that statement and do the math for yourself - if 11% of the >> cases were contracted from an "exemptor, that means 89% were contracted >> from someone who was vaccinated! It seems like the study really showed that >> the vaccine didn't work very well when actually put to the test of having >> to protect someone. > > >A case of selected interpretation ? Here's an extract from the report : > >Results Exemptors were 22.2 times (95% confidence interval [CI], 15.9-31.1) >more likely to acquire measles and 5.9 times (95% CI, 4.2-8.2) more likely to >acquire pertussis than vaccinated children. After adjusting for confounders, >the frequency of exemptors in a county was associated with the incidence rate >of measles (relative risk [RR], 1.6; 95% CI, 1.0-2.4) and pertussis (RR, 1.9; >95% CI, 1.7-2.1) in vaccinated children. Schools with pertussis outbreaks had >more exemptors (mean, 4.3% of students) than schools without outbreaks (1.5% >of students; P = .001). At least 11% of vaccinated children in measles >outbreaks acquired infection through contact with an exemptor. > >Andy. If the vaccine is so effective then why did any vaccinated children become infected? Dave