Niche and Neutral Effects of Acquired Immunity Permit Coexistence of Pneumococcal Serotypes

[摘要]：Over 90 capsular serotypes of Streptococcus pneumoniae, a common nasopharyngeal colonizer and major cause of pneumonia, bacteremia, and meningitis, are known. It is unclear why some serotypes can persist at all: They are more easily cleared from carriage

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