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Razzaghi H, Forrest CB, Hirabayashi K, Wu Q, Allen AJ, Rao S, Chen Y, Bunnell HT, Chrischilles EA, Cowell LG, Cummins MR, Hanauer DA, Higginbotham M, Horne BD, Horowitz CR, Jhaveri R, Kim S, Mishkin A, Muszynski JA, Naggie S, Pajor NM, Paranjape A, Schwenk HT, Sills MR, Tedla YG, Williams DA, Bailey LC. Vaccine Effectiveness Against Long COVID in Children. Pediatrics 2024; 153:e2023064446. [PMID: 38225804 PMCID: PMC10979300 DOI: 10.1542/peds.2023-064446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/15/2023] [Indexed: 01/17/2024] Open
Abstract
OBJECTIVES Vaccination reduces the risk of acute coronavirus disease 2019 (COVID-19) in children, but it is less clear whether it protects against long COVID. We estimated vaccine effectiveness (VE) against long COVID in children aged 5 to 17 years. METHODS This retrospective cohort study used data from 17 health systems in the RECOVER PCORnet electronic health record program for visits after vaccine availability. We examined both probable (symptom-based) and diagnosed long COVID after vaccination. RESULTS The vaccination rate was 67% in the cohort of 1 037 936 children. The incidence of probable long COVID was 4.5% among patients with COVID-19, whereas diagnosed long COVID was 0.8%. Adjusted vaccine effectiveness within 12 months was 35.4% (95 CI 24.5-44.7) against probable long COVID and 41.7% (15.0-60.0) against diagnosed long COVID. VE was higher for adolescents (50.3% [36.6-61.0]) than children aged 5 to 11 (23.8% [4.9-39.0]). VE was higher at 6 months (61.4% [51.0-69.6]) but decreased to 10.6% (-26.8% to 37.0%) at 18-months. CONCLUSIONS This large retrospective study shows moderate protective effect of severe acute respiratory coronavirus 2 vaccination against long COVID. The effect is stronger in adolescents, who have higher risk of long COVID, and wanes over time. Understanding VE mechanism against long COVID requires more study, including electronic health record sources and prospective data.
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Affiliation(s)
- Hanieh Razzaghi
- Applied Clinical Research Center, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Christopher B. Forrest
- Applied Clinical Research Center, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pediatrics
| | - Kathryn Hirabayashi
- Applied Clinical Research Center, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Qiong Wu
- Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Andrea J. Allen
- Applied Clinical Research Center, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Suchitra Rao
- Department of Pediatrics, University of Colorado School of Medicine and Children’s Hospital Colorado, Aurora, Colorado
| | - Yong Chen
- Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - H. Timothy Bunnell
- Biomedical Research Informatics Center, Nemours Children’s Health, Wilmington, Delaware
| | | | - Lindsay G. Cowell
- Peter O’Donnell Jr School of Public Health; Department of Immunology, School of Biomedical Sciences, University of Texas Southwestern Medical Center, Dallas, Texas
| | | | - David A. Hanauer
- Department of Learning Health Sciences, University of Michigan, Ann Arbor, Michigan
| | - Miranda Higginbotham
- Applied Clinical Research Center, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Benjamin D. Horne
- Intermountain Heart Institute, Intermountain Health, Salt Lake City, Utah
| | - Carol R. Horowitz
- Institute for Health Equity Research, Icahn School of Medicine at Mount Sinai, New York City, New York
| | - Ravi Jhaveri
- Division of Infectious Diseases, Ann and Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois
| | - Susan Kim
- Division of Rheumatology, Benioff Children’s Hospital, University of California, San Francisco, San Francisco, California
| | - Aaron Mishkin
- Section of Infectious Diseases, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania
| | - Jennifer A. Muszynski
- Division of Critical Care Medicine, Department of Pediatrics, Nationwide Children’s Hospital, Columbus, Ohio
| | - Susanna Naggie
- Division of Infectious Diseases, Duke University School of Medicine, Duke Clinical Research Institute, Durham, North Carolina
| | - Nathan M. Pajor
- Division of Pulmonary Medicine, Cincinnati Children’s Hospital Medical Center and University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Anuradha Paranjape
- Section of Infectious Diseases, Temple University Lewis Katz School of Medicine, Philadelphia, Pennsylvania
| | - Hayden T. Schwenk
- Division of Pediatric Infectious Diseases, Stanford School of Medicine, Palo Alto, California
| | | | - Yacob G. Tedla
- Division of Epidemiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - David A. Williams
- Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan
| | - L. Charles Bailey
- Applied Clinical Research Center, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pediatrics
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Lee KS, Kim YK, Choi YY, Choe YJ, Kim MH, Lee H. Risk Factors for Severe and Critical Coronavirus Disease 2019 in Children. Pediatr Infect Dis J 2024; 43:234-241. [PMID: 38241652 DOI: 10.1097/inf.0000000000004193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2024]
Abstract
BACKGROUND Coronavirus disease 2019 (COVID-19) is generally mild in children; however, severe or critical cases may occur. In this nationwide study, we analyzed clinical manifestations in children diagnosed with severe acute respiratory syndrome coronavirus 2 to identify high-risk groups for severe or critical disease and compared the clinical features between the Delta- and Omicron-dominant periods. METHODS Data were retrieved from the National Health Insurance Service (NHIS) database and merged with the Korea Disease Control and Prevention Agency-COVID-19-NHIS cohort, which includes information on COVID-19 cases and vaccination records. We included individuals <20 years old diagnosed with COVID-19 during both periods (Delta: July 25, 2021-January 15, 2022; Omicron: January 16, 2022-March 31, 2022). RESULTS Proportion of severe or critical cases was higher during the Delta period than during the Omicron period. The Omicron period saw increased hospitalization for pneumonia and croup and increased likelihood of hospitalization for neurological manifestations. The risk of severe COVID-19 depended on age group (Delta: highest for 12-19 years; Omicron: 0-4 years). This risk was high in children with multiple complex chronic conditions during both periods and with obesity or asthma during the Delta but not during the Omicron period. Two-dose COVID-19 vaccination provided strong protection against severe disease in the Delta period (adjusted odds ratio: 0.20), with reduced effectiveness in the Omicron period (adjusted odds ratio: 0.91). However, it significantly reduced the risk of critical illness (adjusted odds ratio: 0.14). CONCLUSIONS These findings can facilitate identification of children at high risk of severe or critical COVID-19, who may require intensive medical support, and development of vaccination policies.
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Affiliation(s)
- Kyung-Shin Lee
- From the Public Health Research Institute, National Medical Center
| | - Ye Kyung Kim
- Department of Pediatrics, Konkuk University Medical Center
| | - Youn Young Choi
- From the Public Health Research Institute, National Medical Center
- Department of Pediatrics, National Medical Center
| | | | - Myoung-Hee Kim
- Center for Public Health Data Analytics, National Medical Center, Seoul, Republic of Korea
| | - Hyunju Lee
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
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Dias CS, Diniz LM, Oliveira MCL, Simões E Silva AC, Colosimo EA, Mak RH, Pinhati CC, Galante SC, Veloso IY, Martelli-Júnior H, Oliveira EA. Outcomes of SARS-CoV-2 and Seasonal Viruses Among Children Hospitalized in Brazil. Pediatrics 2024; 153:e2023064326. [PMID: 38213278 DOI: 10.1542/peds.2023-064326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/21/2023] [Indexed: 01/13/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Understanding how severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) interacts with other respiratory viruses is crucial for developing effective public health strategies in the postpandemic era. This study aimed to compare the outcomes of SARS-CoV-2 and seasonal viruses in children and adolescents hospitalized with severe acute respiratory infection (SARI). METHODS This population-based, retrospective cohort study included children and adolescents hospitalized with SARI from February 2020 to February 2023 in Brazil. The main exposure of interest was viral etiology. The primary outcome was in-hospital mortality. Competing risk analysis was used to account for time dependency and competing events. RESULTS A total of 235 829 patients had available results of the viral tests, with SARS-CoV-2 predominance. According to the competing-risk survival analysis, the estimated probability of a fatal outcome at 30 days of hospitalization according to the viral strain was 6.5%, 3.4%, 2.9%, 2.3%, 2.1%, and 1.8%, for SARS-CoV-2, coinfection, adenovirus, influenza, other viruses, and respiratory syncytial virus, respectively. Individuals with a positive test for SARS-CoV-2 had hazard of death 3 times higher than subjects with a negative test (hazard ratio, 3.3; 95% confidence interval, 3.1-3.5). After adjustment by the competing-risk multivariable analysis, admission in Northeast and North regions, oxygen saturation <95%, and the presence of comorbidities were risk factors for death in all viral strains. CONCLUSIONS SARS-CoV-2 infection had the highest hazard of in-hospital mortality in this pediatric cohort hospitalized with SARI. Regardless of viral etiology, the presence of underlying medical conditions was a risk factor for death.
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Affiliation(s)
- Cristiane S Dias
- Department of Pediatrics, Health Sciences Postgraduate Program, School of Medicine
| | - Lilian M Diniz
- Department of Pediatrics, Health Sciences Postgraduate Program, School of Medicine
| | | | | | - Enrico A Colosimo
- Department of Statistics, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Robert H Mak
- Department of Pediatrics, Rady Children's Hospital, University of California, San Diego
| | - Clara C Pinhati
- Department of Pediatrics, Health Sciences Postgraduate Program, School of Medicine
| | - Stella C Galante
- Department of Pediatrics, Health Sciences Postgraduate Program, School of Medicine
| | - Isadora Y Veloso
- Department of Pediatrics, Health Sciences Postgraduate Program, School of Medicine
| | - Hercílio Martelli-Júnior
- Health Science/Primary Care Postgraduate Program, State University of Montes Claros (Unimontes), Montes Claros, Minas Gerais, Brazil
| | - Eduardo A Oliveira
- Department of Pediatrics, Health Sciences Postgraduate Program, School of Medicine
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Poukka E, Andersson NW, Thiesson EM, Baum U, Pihlström N, Perälä J, Kristoffersen AB, Meijerink H, Starrfelt J, Ljung R, Hviid A. COVID-19 Vaccine Effectiveness Among Adolescents. Pediatrics 2024; 153:e2023062520. [PMID: 38196395 DOI: 10.1542/peds.2023-062520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/05/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND For adolescents, data on the long-term effectiveness of the BNT162b2 and mRNA-1273 vaccines against severe COVID-19 outcomes are scarce. Additionally, only a few studies have evaluated vaccine effectiveness (VE) for mRNA-1273 or heterologous mRNA vaccine schedules (ie, mixing BNT162b2 and mRNA-1273). METHODS Nationwide register-based 1-to-1 matched cohort analyses were conducted in Denmark, Finland, Norway, and Sweden between May 28, 2021, and April 30, 2023, to estimate VE for primary COVID-19 vaccine (2-dose) schedules among adolescents aged 12 to 17 years. Cumulative incidences of COVID-19-related hospitalization (primary outcome) and laboratory-confirmed SARS-CoV-2 infection (secondary outcome) were compared for vaccinated and unvaccinated at 6 months of follow-up using the Kaplan-Meier estimator. Country-specific VE (1-risk ratio) and risk differences (RD) were combined by random-effects meta-analyses. RESULTS The study included 526 966 primary schedule vaccinated adolescents. VE against COVID-19-related hospitalization was 72.6% (95% confidence interval [CI], 62.5-82.7) and RD was -2.8 (95% CI, -4.5 to -1.0) per 10 000 vaccinated for BNT162b2 at 6 months of follow-up compared with unvaccinated. The corresponding VE and RD were 86.0% (95% CI, 56.8-100.0) and -2.1 (95% CI, -4.0 to -0.2) per 10 000 vaccinated for mRNA-1273 and 80.7% (95% CI, 58.0-100.0) and -5.5 (95% CI, -15.5 to 4.6) per 10 000 vaccinated for heterologous mRNA vaccine schedules. Estimates were comparable when restricting to a period of omicron predominance and extending follow-up to 12 months. CONCLUSIONS Across 4 Nordic countries, severe COVID-19 in adolescents was a rare event. Compared with unvaccinated, BNT162b2, mRNA-1273, and heterologous mRNA vaccination schedules provided high protection against COVID-19-related hospitalization, including hospitalizations during the omicron period.
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Affiliation(s)
- Eero Poukka
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
- Department of Public Health, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | | | | | - Ulrike Baum
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Nicklas Pihlström
- Division of Licensing, Swedish Medical Products Agency, Uppsala, Sweden
| | - Jori Perälä
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
| | | | | | - Jostein Starrfelt
- Department of Infection Control and Preparedness, Norwegian Institute of Public Health, Oslo, Norway
| | - Rickard Ljung
- Division of Use and Information, Swedish Medical Products Agency, Uppsala, Sweden
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Anders Hviid
- Department of Epidemiology Research, Staten Serum Institut, Copenhagen, Denmark
- Department of Drug Design and Pharmacology, Pharmacovigilance Research Center, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Fayad D, Frenck RW. COVID-19 Vaccines in Children. J Clin Med 2023; 13:87. [PMID: 38202094 PMCID: PMC10779890 DOI: 10.3390/jcm13010087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
The COVID-19 pandemic has left an indelible mark on global health, affecting individuals of all ages across diverse communities. While the virus has predominantly been associated with severe outcomes in adults, its impact on children has garnered increasing attention. Today, three COVID-19 vaccines are available for use in the U.S. and recommended by the Advisory Committee on Immunization Practices (ACIP). As of September 2023, ongoing genomic surveillance identified SARS-CoV-2 XBB sublineages as the most common circulating SARS-CoV-2 variants, constituting over 99% of sequenced SARS-CoV-2 specimens in the US. Recently, recommendations for COVID-19 vaccination were updated accordingly to the 2023-2024 Omicron-XBB.1.5-adapted monovalent COVID-19 vaccine to provide heightened protection against currently circulating SARS-CoV-2 XBB-sublineage variants. COVID-19 vaccines have proven to be safe, efficacious, and effective at protecting against COVID-19 and preventing severe illness in children and adolescents.
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Affiliation(s)
| | - Robert W. Frenck
- Division of Infectious Diseases, Department of Pediatrics, Cincinnati Children’s Hospital, University of Cincinnati, Cincinnati, OH 45221, USA;
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Razzaghi H, Forrest CB, Hirabayashi K, Wu Q, Allen A, Rao S, Chen Y, Bunnell HT, Chrischilles EA, Cowell LG, Cummins MR, Hanauer DA, Higginbotham M, Horne BD, Horowitz CR, Jhaveri R, Kim S, Mishkin A, Muszynski JA, Naggie S, Pajor NM, Paranjape A, Schwenk HT, Sills MR, Tedla YG, Williams DA, Bailey C. Vaccine Effectiveness Against Long COVID in Children: A Report from the RECOVER EHR Cohort. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.09.27.23296100. [PMID: 37808803 PMCID: PMC10557822 DOI: 10.1101/2023.09.27.23296100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Objective Vaccination reduces the risk of acute COVID-19 in children, but it is less clear whether it protects against long COVID. We estimated vaccine effectiveness (VE) against long COVID in children aged 5-17 years. Methods This retrospective cohort study used data from 17 health systems in the RECOVER PCORnet electronic health record (EHR) Program for visits between vaccine availability, and October 29, 2022. Conditional logistic regression was used to estimate VE against long COVID with matching on age group (5-11, 12-17) and time period and adjustment for sex, ethnicity, health system, comorbidity burden, and pre-exposure health care utilization. We examined both probable (symptom-based) and diagnosed long COVID in the year following vaccination. Results The vaccination rate was 56% in the cohort of 1,037,936 children. The incidence of probable long COVID was 4.5% among patients with COVID-19, while diagnosed long COVID was 0.7%. Adjusted vaccine effectiveness within 12 months was 35.4% (95 CI 24.5 - 44.5) against probable long COVID and 41.7% (15.0 - 60.0) against diagnosed long COVID. VE was higher for adolescents 50.3% [36.3 - 61.0]) than children aged 5-11 (23.8% [4.9 - 39.0]). VE was higher at 6 months (61.4% [51.0 - 69.6]) but decreased to 10.6% (-26.8 - 37.0%) at 18-months. Discussion This large retrospective study shows a moderate protective effect of SARS-CoV-2 vaccination against long COVID. The effect is stronger in adolescents, who have higher risk of long COVID, and wanes over time. Understanding VE mechanism against long COVID requires more study, including EHR sources and prospective data. Article Summary Vaccination against COVID-19 has a protective effect against long COVID in children and adolescents. The effect wanes over time but remains significant at 12 months. What’s Known on This Subject Vaccines reduce the risk and severity of COVID-19 in children. There is evidence for reduced long COVID risk in adults who are vaccinated, but little information about similar effects for children and adolescents, who have distinct forms of long COVID. What This Study Adds Using electronic health records from US health systems, we examined large cohorts of vaccinated and unvaccinated patients <18 years old and show that vaccination against COVID-19 is associated with reduced risk of long COVID for at least 12 months. Contributors’ Statement Drs. Hanieh Razzaghi and Charles Bailey conceptualized and designed the study, supervised analyses, drafted the initial manuscript, and critically reviewed and revised the manuscript.Drs. Christopher Forrest and Yong Chen designed the study and critically reviewed and revised the manuscript.Ms. Kathryn Hirabayashi, Ms. Andrea Allen, and Dr. Qiong Wu conducted analyses, and critically reviewed and revised the manuscript.Drs. Suchitra Rao, H Timothy Bunnell, Elizabeth A. Chrischilles, Lindsay G. Cowell, Mollie R. Cummins, David A. Hanauer, Benjamin D. Horne, Carol R. Horowitz, Ravi Jhaveri, Susan Kim, Aaron Mishkin, Jennifer A. Muszynski, Susanna Nagie, Nathan M. Pajor, Anuradha Paranjape, Hayden T. Schwenk, Marion R. Sills, Yacob G. Tedla, David A. Williams, and Ms. Miranda Higginbotham critically reviewed and revised the manuscript.All authors approved the final manuscript as submitted and agree to be accountable for all aspects of the work. Authorship statement Authorship has been determined according to ICMJE recommendations.
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Link-Gelles R, Ciesla AA, Rowley EA, Klein NP, Naleway AL, Payne AB, Kharbanda A, Natarajan K, DeSilva MB, Dascomb K, Irving SA, Zerbo O, Reese SE, Wiegand RE, Najdowski M, Ong TC, Rao S, Stockwell MS, Stephens A, Goddard K, Martinez YC, Weber ZA, Fireman B, Hansen J, Timbol J, Grannis SJ, Barron MA, Embi PJ, Ball SW, Gaglani M, Grisel N, Arndorfer J, Tenforde MW, Fleming-Dutra KE. Effectiveness of Monovalent and Bivalent mRNA Vaccines in Preventing COVID-19-Associated Emergency Department and Urgent Care Encounters Among Children Aged 6 Months-5 Years - VISION Network, United States, July 2022-June 2023. MMWR. MORBIDITY AND MORTALITY WEEKLY REPORT 2023; 72:886-892. [PMID: 37590187 PMCID: PMC10441825 DOI: 10.15585/mmwr.mm7233a2] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
On June 19, 2022, the original monovalent mRNA COVID-19 vaccines were approved as a primary series for children aged 6 months-4 years (Pfizer-BioNTech) and 6 months-5 years (Moderna) based on safety, immunobridging, and limited efficacy data from clinical trials. On December 9, 2022, CDC expanded recommendations for use of updated bivalent vaccines to children aged ≥6 months. mRNA COVID-19 vaccine effectiveness (VE) against emergency department or urgent care (ED/UC) encounters was evaluated within the VISION Network during July 4, 2022-June 17, 2023, among children with COVID-19-like illness aged 6 months-5 years. Among children aged 6 months-5 years who received molecular SARS-CoV-2 testing during August 1, 2022-June 17, 2023, VE of 2 monovalent Moderna doses against ED/UC encounters was 29% (95% CI = 12%-42%) ≥14 days after dose 2 (median = 100 days after dose 2; IQR = 63-155 days). Among children aged 6 months-4 years with a COVID-19-like illness who received molecular testing during September 19, 2022-June 17, 2023, VE of 3 monovalent Pfizer-BioNTech doses was 43% (95% CI = 17%-61%) ≥14 days after dose 3 (median = 75 days after dose 3; IQR = 40-139 days). Effectiveness of ≥1 bivalent dose, comparing children with at least a complete primary series and ≥1 bivalent dose to unvaccinated children, irrespective of vaccine manufacturer, was 80% (95% CI = 42%-96%) among children aged 6 months-5 years a median of 58 days (IQR = 32-83 days) after the dose. All children should stay up to date with recommended COVID-19 vaccines, including initiation of COVID-19 vaccination immediately when they are eligible.
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