This report of the experience with the vaccine in the greater Calgary region shows 2 important results. First, rates of severe infection due to Streptococcus pneumoniae (the causative agent and target of the vaccine) have fallen dramatically among children, especially for the 7 common varieties of S. pneumoniae that are covered by the vaccine. Second, there is a spillover effect among adults over 65 years of age (for whom a similar vaccine is recommended and widely used in Alberta): rates of invasive infections due to the 7 serotypes of S. pneumoniae covered by the child vaccine have also fallen.
A line graph showing the changes in rates of the period 1998 to 2004 is available.
http://www.cmaj.ca/misc/press/pg1149.pdf
p. 1149 Vaccination of infants with new pneumococcal vaccine prevents serious illness
J.D. Kellner et al
Canadian Medical Association Journal