A four cross-sectional studies of meningococcal carriage in people aged 9 months to 36 years in two districts of Burkina Faso between May 2, 2016, and Nov 6, 2017 was done to assess the long-term effect of MenAfriVac vaccination on meningococcal carriage and herd immunity.

7 years after the mass MenAfriVac campaign, there seemed to be an absence of serogroup A carriage. The investigators concluded, “Further evaluations and modelling of potential vaccination strategies are needed to inform vaccination policy for future multivalent meningococcal vaccines, as well as to evaluate the effect of these vaccines on disease, carriage, and herd immunity.”

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