Neisseria meningitidis serogroup B (NmB) and non-NmB carriage analyses for both cohorts. NmB isolates from all 3 visits (n = 45) (A) were characterized by whole-genome sequencing (WGS) to determine multilocus sequence typing (MLST)/clonal complex and factor H binding protein (fHBP) assignment. Results are presented for ninth-grade, eleventh-grade/college entry, and university students. Non-NmB isolates (B) from all 3 visits (n = 143) were characterized by PCR (serogroup assignment, except eleventh grade by WGS) and sequence analysis (fHBP assignment). NT, nontypeable; NG, nongroupable.