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Phylogenetic tree and data of clonal complex 4821 Neisseria meningitidis sublineage L44.1 (ChinaCC4821-R1-C/B) isolates. Red text indicates the oldest isolate of the sublineage; blue text, the isolates from countries outside of China; and green text, the dominant type or allele. Scale bar indicates substitutions per site. IMD, invasive meningococcal disease; MSM, men who have sex with men; SG, serogroup; ST, sequence type; VR, variable region.
