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The distribution of meningococcal serogroups varies across countries.2
Almost half of the invasive meningococcal disease cases worldwide are caused by serogroups A, C, W and Y15
Burden of MenW
The incidence of MenW, a serogroup often associated with high fatality, has been increasing.16
Recently, surges of MenW incidence with cases of a hypervirulent strain have been associated with invasive meningococcal disease and higher fatality rates compared with other serogroups.16
Adapted from Booy et al, 2019.
MenW is often associated with higher fatality rates compared with other serogroups.17
MenW has emerged with high case fatality
Adapted from Villena R, et al. Vaccine. 2019; Presa JV, et al. Int J Infect Dis. 2019;
Loenenbach AD, et al. Clin Infect Dis. 2020; Ladhani SN, et al. Clin Infect Dis. 2015; Australian DOH. Invasive Meningococcal Disease National Surveillance Report with a Focus on MenW. 2017.
*“Other” includes serogroups other than A, B, C, W, and Y and cases where the serogroup was not determined; with the exception of the EU and US, which also included serogroup A.
†Percent value indicates the proportion of meningococcal disease caused by MenW.
NT, non-typeable; MenW, meningococcal serogroup W; IMD, invasive meningococcal disease
Approval Code: BF0098OA686/052023
Invalidation date: 10/05/2025
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