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Moline HL, Tannis A, Toepfer AP, Williams JV, Boom JA, Englund JA, Halasa NB, Staat MA, Weinberg GA, Selvarangan R, Michaels MG, Sahni LC, Klein EJ, Stewart LS, Schlaudecker EP, Szilagyi PG, Schuster JE, Goldstein L, Musa S, Piedra PA, Zerr DM, Betters KA, Rohlfs C, Albertin C, Banerjee D, McKeever ER, Kalman C, Clopper BR, McMorrow ML, Dawood FS. Early Estimate of Nirsevimab Effectiveness for Prevention of Respiratory Syncytial Virus-Associated Hospitalization Among Infants Entering Their First Respiratory Syncytial Virus Season - New Vaccine Surveillance Network, October 2023-February 2024. MMWR Morb Mortal Wkly Rep 2024; 73:209-214. [PMID: 38457312 PMCID: PMC10932582 DOI: 10.15585/mmwr.mm7309a4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/10/2024]
Abstract
Respiratory syncytial virus (RSV) is the leading cause of hospitalization among infants in the United States. In August 2023, CDC's Advisory Committee on Immunization Practices recommended nirsevimab, a long-acting monoclonal antibody, for infants aged <8 months to protect against RSV-associated lower respiratory tract infection during their first RSV season and for children aged 8-19 months at increased risk for severe RSV disease. In phase 3 clinical trials, nirsevimab efficacy against RSV-associated lower respiratory tract infection with hospitalization was 81% (95% CI = 62%-90%) through 150 days after receipt; post-introduction effectiveness has not been assessed in the United States. In this analysis, the New Vaccine Surveillance Network evaluated nirsevimab effectiveness against RSV-associated hospitalization among infants in their first RSV season during October 1, 2023-February 29, 2024. Among 699 infants hospitalized with acute respiratory illness, 59 (8%) received nirsevimab ≥7 days before symptom onset. Nirsevimab effectiveness was 90% (95% CI = 75%-96%) against RSV-associated hospitalization with a median time from receipt to symptom onset of 45 days (IQR = 19-76 days). The number of infants who received nirsevimab was too low to stratify by duration from receipt; however, nirsevimab effectiveness is expected to decrease with increasing time after receipt because of antibody decay. Although nirsevimab uptake and the interval from receipt of nirsevimab were limited in this analysis, this early estimate supports the current nirsevimab recommendation for the prevention of severe RSV disease in infants. Infants should be protected by maternal RSV vaccination or infant receipt of nirsevimab.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - New Vaccine Surveillance Network Product Effectiveness Collaborators
- Coronavirus and Other Respiratory Viruses Division, National Center for Immunization and Respiratory Diseases, CDC; UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania; Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Texas Children’s Hospital, Houston, Texas; Baylor College of Medicine, Houston, Texas; Department of Pediatrics, Seattle Children’s Hospital, Seattle, Washington; Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee; Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio; Department of Pediatrics, University of Rochester Medical Center and University of Rochester–Golisano Children’s Hospital, Rochester, New York; Department of Pathology and Laboratory Medicine, Children’s Mercy Hospital, Kansas City, Missouri; Department of Pediatrics Children’s Mercy Hospital, Kansas City, Missouri
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Curns AT, Rha B, Lively JY, Sahni LC, Englund JA, Weinberg GA, Halasa NB, Staat MA, Selvarangan R, Michaels M, Moline H, Zhou Y, Perez A, Rohlfs C, Hickey R, Lacombe K, McHenry R, Whitaker B, Schuster J, Pulido CG, Strelitz B, Quigley C, Dnp GW, Avadhanula V, Harrison CJ, Stewart LS, Schlaudecker E, Szilagyi PG, Klein EJ, Boom J, Williams JV, Langley G, Gerber SI, Hall AJ, McMorrow ML. Respiratory Syncytial Virus-Associated Hospitalizations Among Children <5 Years Old: 2016 to 2020. Pediatrics 2024; 153:e2023062574. [PMID: 38298053 DOI: 10.1542/peds.2023-062574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/11/2023] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND Respiratory syncytial virus (RSV) is the leading cause of hospitalization in US infants. Accurate estimates of severe RSV disease inform policy decisions for RSV prevention. METHODS We conducted prospective surveillance for children <5 years old with acute respiratory illness from 2016 to 2020 at 7 pediatric hospitals. We interviewed parents, reviewed medical records, and tested midturbinate nasal ± throat swabs by reverse transcription polymerase chain reaction for RSV and other respiratory viruses. We describe characteristics of children hospitalized with RSV, risk factors for ICU admission, and estimate RSV-associated hospitalization rates. RESULTS Among 13 524 acute respiratory illness inpatients <5 years old, 4243 (31.4%) were RSV-positive; 2751 (64.8%) of RSV-positive children had no underlying condition or history of prematurity. The average annual RSV-associated hospitalization rate was 4.0 (95% confidence interval [CI]: 3.8-4.1) per 1000 children <5 years, was highest among children 0 to 2 months old (23.8 [95% CI: 22.5-25.2] per 1000) and decreased with increasing age. Higher RSV-associated hospitalization rates were found in premature versus term children (rate ratio = 1.95 [95% CI: 1.76-2.11]). Risk factors for ICU admission among RSV-positive inpatients included: age 0 to 2 and 3 to 5 months (adjusted odds ratio [aOR] = 1.97 [95% CI: 1.54-2.52] and aOR = 1.56 [95% CI: 1.18-2.06], respectively, compared with 24-59 months), prematurity (aOR = 1.32 [95% CI: 1.08-1.60]) and comorbid conditions (aOR = 1.35 [95% CI: 1.10-1.66]). CONCLUSIONS Younger infants and premature children experienced the highest rates of RSV-associated hospitalization and had increased risk of ICU admission. RSV prevention products are needed to reduce RSV-associated morbidity in young infants.
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Affiliation(s)
- Aaron T Curns
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Brian Rha
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Joana Y Lively
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Leila C Sahni
- Texas Children's Hospital and Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | | | - Geoffrey A Weinberg
- Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York
| | | | - Mary A Staat
- Department of Pediatrics, University of Cincinnati, Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | | | - Marian Michaels
- UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - Heidi Moline
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Yingtao Zhou
- Centers for Disease Control and Prevention, Atlanta, Georgia
- TDB Communications, Inc, Atlanta, Georgia
| | - Ariana Perez
- Centers for Disease Control and Prevention, Atlanta, Georgia
- GDIT, Atlanta, Georgia
| | - Chelsea Rohlfs
- Department of Pediatrics, University of Cincinnati, Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Robert Hickey
- UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | | | - Rendie McHenry
- Vanderbilt University Medical Center, Nashville, Tennessee
| | - Brett Whitaker
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | | | | | - Christina Quigley
- Department of Pediatrics, University of Cincinnati, Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | | | - Vasanthi Avadhanula
- Texas Children's Hospital and Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | | | | | - Elizabeth Schlaudecker
- Department of Pediatrics, University of Cincinnati, Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Peter G Szilagyi
- UCLA Mattel Children's Hospital, University of California at Los Angeles, Los Angeles, California
| | | | - Julie Boom
- Texas Children's Hospital and Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - John V Williams
- UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - Gayle Langley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Susan I Gerber
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Aron J Hall
- Centers for Disease Control and Prevention, Atlanta, Georgia
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