Frequency of Neisseria meningitidis serogroup B (NmB) results by 3 diagnostic methods for both cohorts. The numbers of instances in which NmB was detected for subjects by seroagglutination, isolate PCR, direct swab PCR (ninth-grade and university students); by isolate whole-genome sequencing (WGS), isolate PCR, direct swab PCR, and live cell phenotypic assay (LCPA) (eleventh-grade/college entry students); and by multiple methods are shown as Venn diagrams for ninth-grade students (A), eleventh-grade/college entry students (B), and university students (C).