RSV Vaccination + Immunization for Respiratory Syncytial Virus
Trial Summary
What is the purpose of this trial?
Respiratory Syncytial Virus (RSV) is the leading cause of lower respiratory tract infections (LRTIs) in infants and young children. It is also a leading cause of mortality in children \<5 years of age worldwide. Until recently, no Food and Drug Administration (FDA)-approved vaccines were available to prevent RSV infection. The only prophylactic product for RSV prevention recommended for infants was the monoclonal antibody palivizumab, but administration was limited to those with extreme prematurity, chronic lung disease, or hemodynamically significant congenital heart disease. However, in 2023, the FDA approved two products designed to prevent RSV lower respiratory tract disease (LRTD) in all infants: an active RSV vaccine based on the prefusion F protein (RSVpreF, ABRYSVO, Pfizer) administered during pregnancy, and a passive, long-acting monoclonal antibody (nirsevimab-alip \[henceforth referred to as nirsevimab\], BEYFORTUS, AstraZeneca) administered to infants at birth or at the start of their first RSV season. Both products were evaluated in Phase 3 pivotal clinical trials and have high efficacy in preventing LRTD caused by RSV in infants. Although there is no established correlate of protection against RSV, antibodies have been associated with protection across multiple studies. The clinical development plan for the products did not include comprehensive evaluations of the magnitude and durability of the immune response, nor were the two products tested in a single trial. This study is a prospective, randomized, open-label Phase 4 study with the primary objective of evaluating the magnitude and durability of RSV-specific neutralizing antibodies in infants through 12 months of life following either maternal RSV vaccination, infant nirsevimab administration, or both products combined.
Will I have to stop taking my current medications?
The trial does not specify if you need to stop taking your current medications, but you cannot participate if you have taken immunosuppressive drugs or certain biologic agents within 30 days before enrolling. Inhaled, topical, or certain other forms of steroids are allowed.
What data supports the effectiveness of the drug Nirsevimab for preventing respiratory syncytial virus (RSV) infection?
Nirsevimab has been shown to be effective in preventing RSV infection in newborns and infants during their first RSV season, as demonstrated by positive results in Phase 2b and 3 clinical trials. It is a long-acting antibody that targets a specific part of the RSV virus, allowing for a single dose to provide protection throughout the RSV season.12345
Is the RSV treatment Nirsevimab safe for humans?
How is the drug Abrysvo, Beyfortus different from other RSV treatments?
Abrysvo and Beyfortus are unique because they offer a long-acting protection against RSV with a single dose, unlike the existing option palivizumab, which requires monthly injections. Beyfortus (Nirsevimab) specifically targets a stable part of the RSV virus, providing effective prevention for infants during their first RSV season.13459
Research Team
Eligibility Criteria
This trial is for healthy infants at risk of Respiratory Syncytial Virus (RSV) infection. It includes those whose mothers are vaccinated during pregnancy with ABRYSVO and infants receiving BEYFORTUS at birth or the start of RSV season. Specific eligibility criteria were not provided.Inclusion Criteria
Exclusion Criteria
Trial Timeline
Screening
Participants are screened for eligibility to participate in the trial
Treatment
Mothers receive RSVpreF vaccine during pregnancy and infants receive nirsevimab at birth or at 3 months
Follow-up
Participants are monitored for safety and effectiveness after treatment
Treatment Details
Interventions
- Abrysvo (Cancer Vaccine)
- Beyfortus (Monoclonal Antibodies)
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Who Is Running the Clinical Trial?
National Institute of Allergy and Infectious Diseases (NIAID)
Lead Sponsor
Dr. Jeanne Marrazzo
National Institute of Allergy and Infectious Diseases (NIAID)
Chief Executive Officer since 2023
MD, MPH
Dr. H. Clifford Lane
National Institute of Allergy and Infectious Diseases (NIAID)
Chief Medical Officer
MD