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Observed and projected cases of W, Y, and B invasive meningococcal disease in England determined on the basis of trend lines fitted to the prevaccination period (November 2010–11 to 2014–15) and extrapolated to the 2015–16 academic year for the cohort with group W, Y, and B invasive meningococcal disease and who left school. Men, meningococcal.
