Immunization against recurrent otitis media.
D000208:Acute Disease; D000367:Age Factors; D006801:Humans; D007223:Infant; D010033:Otitis Media / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control*; D011135:Polysaccharides, Bacterial / Q000276:immunology; D012008:Recurrence; D013296:Streptococcus pneumoniae / Q000276:immunology / Q000302:isolation & purification; D014611:Vaccination
D011135:Polysaccharides, Bacterial