Fig. 1From: Incidence of acute otitis media in children in the United States before and after the introduction of 7- and 13-valent pneumococcal conjugate vaccines during 1998–2018Trends in annual incidence rates of AOM by age group among commercially insured children aged < 18 years, in episodes per 1000 patient-years (1998–2018). AOM acute otitis media, PCV pneumococcal conjugate vaccine, PY person-years. Simple and recurrent episodes were categorized in patients with at least 12 months of continuous health plan enrollment prior to the index episodeBack to article page