During the first 12 months of an emergency meningococcal ACWY vaccination program for teenagers in England, coverage among persons who left school in 2015, the first cohort to be vaccinated, was 36.6%. There were 69% fewer group W meningococcal cases than predicted by trend analysis and no cases in vaccinated teenagers.
Keywords: England; MenACWY; Neisseria meningitides; bacteria; epidemiology; group W meningococcal disease; meningitis/encephalitis; meningococcal ACWY conjugate vaccine; meningococcal infections; meningococcal vaccines; outbreak; serogroup W-135; teenagers; vaccination.