Figure 3From: Persistent low carriage of serogroup A Neisseria meningitidistwo years after mass vaccination with the meningococcal conjugate vaccine, MenAfriVac Meningococcal carriage prevalence in Burkina Faso in 2012, by age and serogroup. The figure shows meningococcal carriage prevalence (%) by age for all meningococci (Nm) and for serogroups W, X, Y and nongroupable (NG) meningococci.Back to article page