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. 2013 Feb 14;8(2):e55486. doi: 10.1371/journal.pone.0055486

Figure 4. Age-specific prevalence of serum bactericidal antibody (SBA) titers against meningococcal serogroup A equal to or above different cut-offs against the reference strain versus age-specific meningococcal serogroup A meningitis annual incidence during March 2007 through February 2008.

Figure 4

General population of Bobo-Dioulasso, Burkina Faso.