Evaluating Nirsevimab's effect on RSV hospitalizations in infants

Evaluation of the Effect of Nirsevimab on Hospitalizations Due to RSV Infection in Infants Under One Year of Age: A Case-Control Study

Meyer Children's Hospital IRCCS · NCT06856967

This study is testing if a new antibody called Nirsevimab can help prevent infants under one year old from being hospitalized due to RSV infections.

Quick facts

Study typeObservational
Enrollment138 (estimated)
AgesN/A to 12 Months
SexAll
SponsorMeyer Children's Hospital IRCCS (other)
Drugs / interventionsPalivizumab, Nirsevimab
Locations8 sites (Arezzo, Arezzo and 7 other locations)
Trial IDNCT06856967 on ClinicalTrials.gov

What this trial studies

This observational study aims to assess the effectiveness of Nirsevimab, a monoclonal antibody, in reducing hospitalizations due to respiratory syncytial virus (RSV) infections in infants under one year of age. Conducted in Tuscany, Italy, the study will utilize a matched case-control design to evaluate real-world outcomes during the RSV epidemic season of 2024-2025. Additionally, it will analyze the impact of the Nirsevimab immunization campaign on RSV epidemiology, focusing on various patient demographics and clinical outcomes. The goal is to enhance RSV prevention strategies and inform public health policies.

Who should consider this trial

Good fit: Ideal candidates for this study are infants under 12 months old diagnosed with lower respiratory tract infections and confirmed RSV infections.

Not a fit: Patients who may not benefit from this study include those who have previously received immunization with Palivizumab or maternal RSV vaccine immunization during pregnancy.

Why it matters

Potential benefit: If successful, this study could significantly reduce RSV-related hospitalizations in infants, improving health outcomes and reducing healthcare costs.

How similar studies have performed: Other studies have shown promising results with monoclonal antibodies for RSV prevention, indicating potential success for this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

Case patients

* Age \<12 months
* Diagnosis of LRTI (i.e., bronchiolitis and/or pneumonia) at admission
* Positive RSV PCR on nasopharyngeal swab Control patients
* Age \<12 months
* Diagnosis of LRTI (i.e., bronchiolitis and/or pneumonia) at admission
* Hospitalized for conditions other than respiratory infections

Exclusion Criteria:

* Parental refusal
* Previous immunization with Palivizumab
* Previous maternal RSV vaccine immunization during pregnancy

Where this trial is running

Arezzo, Arezzo and 7 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Respiratory Synctial Virus Infections

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.