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.
p. 1149 Vaccination of infants with new pneumococcal vaccine prevents serious illness
J.D. Kellner et al