Incidence of Invasive Pneumococcal Disease in US Children by Risk Group, 1998-2023

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ID: 327279
2026
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Abstract
BACKGROUND: Children with risk conditions are vulnerable to invasive pneumococcal disease (IPD) and are targeted for routine and supplemental pneumococcal vaccination. This study aimed to quantify the incidence of IPD in US children by risk group since PCV introduction. METHODS: IPD episodes were identified in the Merative™ MarketScan® Commercial Database (1998-2023) and Multi-State Medicaid Database (2001-2023) using inpatient and outpatient claims. Annual IPD incidence rates (IRs) were calculated as episodes per 100 000 person-years (PY) for children <18 years of age, overall and by insurance type, age, and risk group. Incidence rate ratios (IRRs) were calculated to compare IR for children with chronic medical conditions (CMC) and immunocompromising conditions (IC) with those with no CMC/IC. RESULTS: A total of 3538 commercially-insured and 3268 Medicaid-insured children with ≥1 IPD episode were identified among 128.9 million (121.9 million PYs) and 71.2 million eligible children (65.0 million PYs), respectively. Across age and risk groups, IPD IRs decreased over time, regardless of insurance type. Commercially-insured children with CMC and IC had 3.1-8.6 and 19.1-74.5 times higher IPD IRs, respectively, than those without CMC/IC, with similar patterns in the Medicaid database. IPD IRs were the highest among children <2 years, while risk-group disparities were greater among older children. IRRs comparing CMC and IC vs. no CMC/IC increased over time, indicating widening disparities. CONCLUSIONS: IPD IRs among children with CMC/IC remain substantially higher than those without CMC/IC, and IRR for children with risk conditions has increased over time. The risk-group disparities were more pronounced in older children. Better prevention strategies are needed to prevent IPD in children with risk conditions.
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Authors Salini Mohanty, Nicolae Done, Yan Song, Travis Wang, Abigail Zion, Emily Reichert, Tayler Li, Meghan White, Kelsie Cassell, Yi-Ling Huang, Jessica Weaver, Kelly Johnson, Natalie Banniettis, Kristen A. Feemster
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Journal journal of the pediatric infectious diseases society
Year 2026
DOI
10.1093/jpids/piag084
URL
https://academic.oup.com/jpids/advance-article-pdf/doi/10.1093/jpids/piag084/70868030/piag084.pdf
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