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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
REVIEW
The multifaceted impact of pneumococcal conjugate vaccine implementation in children in France between 2001 to 2014.
In 2003, France was the first European country to recommend 7-valent pneumococcal conjugate vaccine (PCV7) for a large proportion of healthy children. With complicated recommendations, the vaccine coverage during the first 4 y of implementation was low, then progressively increased to reach 90% in 2008. The aim of this review was to describe the particular impact of PCVs in a country where the vaccine coverage was initially suboptimal. After PCV7 implementation, the PCV7 serotypes nearly disappeared among pneumococci isolated from meningitis (-73%), other invasive pneumococcal disease (IPD; -90%) and pneumococcal carriage (-97%). Consequently, the rates of penicillin-resistant strains declined. However, because of important serotype replacement, the global effect on the incidence of meningitis (-31%) or other IPD (-14%) was modest and observed only in young children < 2 y old. After PCV13 transition, with immediate high vaccine coverage, the vaccine had an important impact on all pneumococcal disease: reduction of -20% for pneumococcal meningitis, -36% for non-meningitis IPD, -32% for community acquired pneumonia and -15% for S. pneumoniae carriage. These findings underline the complexity of pneumococcal epidemiology and the importance of high and fast vaccination coverage to obtain the optimal effect of PCVs.
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