Fig. 2From: Serotype distribution and antibiotic resistance of Streptococcus pneumoniae isolates from 17 Chinese cities from 2011 to 2016Distribution and proportion of 881Â S. pneumoniae strains collected between 2011 and 2016. N23F strains belong to serogroup 23 but not serotype 23F. NVT: serotypes not included in the PPV23. Serotypes 4, 6B, 9, 14, 18, 19F, and 23F are included in PCV7. Serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9, 14, 18C, 19A, 19F, and 23F are included in PCV13Back to article page