CHMP recommends approval of Beyfortus® (nirsevimab) for prevention of RSV disease in infants
- Recommendation is based on the Beyfortus clinical trial program which demonstrated protection against medically attended lower respiratory tract infection caused by RSV with a single dose during the RSV season
- If approved, Beyfortus would be the first broadly protective option for newborns and infants
Jean-François Toussaint
Global Head of Research and Development Vaccines,
“Today’s positive CHMP opinion is one of the most significant public health achievements in RSV in decades and has the potential to alleviate the enormous physical and emotional burden that RSV can place on families and healthcare systems. With this endorsement, we are one step closer to achieving our goal of protecting all infants against RSV with a single dose.”
IskraReic
Executive Vice President, Vaccines and Immune Therapies, AstraZeneca
“This positive CHMP opinion underscores Beyfortus’ potential as a ground-breaking, first-in-class passive immunization that could transform the medical community’s approach to RSV prevention in infants.”
The CHMP based its positive opinion on results from the Beyfortus clinical development program, including the Phase 3 MELODY, Phase 2/3 MEDLEY, and Phase 2b trials.1-8 In the MELODY and Phase 2b trials, Beyfortus met its primary endpoint of reducing the incidence of medically attended lower respiratory tract infections (LRTI) caused by RSV during the RSV season vs. placebo with a single dose. 1-6 The safety profile of Beyfortus was similar to placebo. Beyfortus also demonstrated a comparable safety and tolerability profile to palivizumab in the Phase 2/3 MEDLEY trial.7-8
RSV is the most common cause of LRTIs and a leading cause of hospitalization in all infants, with most hospitalizations occurring in infants born healthy and at term.9-13 RSV-related direct medical costs, globally — including hospital, outpatient and follow-up care — were estimated at €4.82 billion in 2017.14 Currently there is no preventative option available for all infants and treatment is limited to symptomatic relief.15,16
About Beyfortus
Beyfortus® (nirsevimab), an investigational long-acting antibody designed for all infants for protection against RSV disease from birth through their first RSV season with a single dose, is being developed jointly by
Beyfortus has been developed to offer newborns and infants direct RSV protection via an antibody to help prevent LRTI caused by RSV. Monoclonal antibodies do not require the activation of the immune system to help offer timely, rapid and direct protection against disease.17
In
Beyfortus has been granted designations to facilitate expedited development by several major regulatory agencies around the world. These include Breakthrough Therapy Designation by
About the clinical trials
The Phase 2b trial was a randomized, placebo-controlled trial designed to measure the efficacy of Beyfortus® (nirsevimab) against medically attended LRTI through 150 days post-dose. Healthy preterm infants of 29–35 weeks’ gestation were randomized (2:1) to receive a single 50mg intramuscular injection of Beyfortus or placebo. The primary endpoint was met, reducing the incidence of medically attended LRTI, caused by RSV by 70.1% (95% CI: 52.3, 81.2) compared to placebo. Between
The Phase 3 MELODY trial was a randomized, placebo-controlled trial conducted across 21 countries designed to determine efficacy of Beyfortus against medically attended LRTI due to RSV confirmed by reverse transcriptase polymerase chain reaction testing through 150 days after dosing, versus placebo, in healthy late preterm and term infants (35 weeks gestational age or greater) entering their first RSV season.1,2 The primary endpoint was met, reducing the incidence of medically attended LRTI, such as bronchiolitis or pneumonia, caused by RSV by 74.5% (95% CI 49.6, 87.1; P<0.001) compared to placebo. Infants were randomized (2:1) to receive a single 50mg (in infants weighing <5kg) or 100mg (in infants weighing ≥5kg) intramuscular injection of Beyfortus or placebo. Between
Findings from Beyfortus’ clinical trial program include a pre-specified pooled analysis of the Phase 3 MELODY trial and the recommended dose from the Phase 2b trial, in which an efficacy (relative risk reduction versus placebo) of 79.5% (95% CI 65.9, 87.7; P<0.0001) was seen against medically attended LRTI, such as bronchiolitis or pneumonia, caused by RSV in infants born at term or preterm entering their first RSV season.5 The pooled analysis studied healthy preterm and term infants who received the recommended dose of Beyfortus based on weight compared to placebo through Day 151 and showed an efficacy of 77.3% (95% CI 50.3, 89.7; P<0.001) against RSV LRTI hospitalizations, as published in NEJM in
MEDLEY was a Phase 2/3, randomized, double-blind, palivizumab-controlled trial with the primary objective of assessing safety and tolerability for Beyfortus in preterm infants and infants with congenital heart disease (CHD) and/or chronic lung disease of prematurity (CLD) eligible to receive palivizumab.7,8 Between
The results of MELODY, Phase 2/3 MEDLEY and the Phase 2b trials illustrate that Beyfortus helps protect infants during their first RSV season against RSV disease with a single dose.1-8 This all-infant population includes preterm, healthy late preterm and term infants, as well as infants with specific conditions.
These trials form the basis of regulatory submissions that began in 2022.
About RSV
RSV is the most common cause of LRTI, including bronchiolitis and pneumonia, in infants.9 It is also a leading cause of hospitalization in all infants, with most hospitalizations for RSV occurring in healthy infants born at term.10-13 Globally, in 2019, there were approximately 33 million cases of acute lower respiratory infections leading to more than three million hospitalizations, and it was estimated that there were 26,300 in-hospital deaths of children younger than five years.18 RSV-related direct medical costs, globally — including hospital, outpatient and follow-up care — were estimated at €4.82 billion in 2017.14
About
We are an innovative global healthcare company, driven by one purpose: we chase the miracles of science to improve people’s lives. Our team, across some 100 countries, is dedicated to transforming the practice of medicine by working to turn the impossible into the possible. We provide potentially life-changing treatment options and life-saving vaccine protection to millions of people globally, while putting sustainability and social responsibility at the center of our ambitions.
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References
- Hammitt LL, MD et al. Nirsevimab for Prevention of RSV in Healthy Late -Preterm and Term Infants. N Engl J Med. 2022;386 (9): 837-846. doi: 10.1056/NEJMoa2110275.
- Clinicaltrials.gov. A Study to Evaluate the Safety and Efficacy of MEDI8897 for the Prevention of Medically Attended RSV LRTI in Healthy Late Preterm and Term Infants (MELODY). https://clinicaltrials.gov/ct2/show/NCT03979313. Accessed
September 2022 . - Clinicaltrials.gov. A Study to Evaluate the Safety and Efficacy of MEDI8897 for the Prevention of Medically Attended RSV LRTI in Healthy Preterm Infants. (MEDI8897 Ph2b). https://clinicaltrials.gov/ct2/show/results/NCT02878330. Accessed
September 2022 . - Griffin P, MD et al. (2020). Single-Dose Nirsevimab for Prevention of RSV in Preterm Infants. NEJM 2020; 383: 415-425. DOI: 10.1056/NEJMoa1913556.
- Simões, E, et al. Pooled efficacy of nirsevimab against RSV lower respiratory tract infection in preterm and term infants. ESPID 2022
Congress ; 2022May 9-13 . HybridCongress . - Wilkins, D, et al. Nirsevimab for the prevention of respiratory syncytial virus infection: neutralizing antibody levels following a single dose. ESPID 2022
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- Clinicaltrials.gov. A Study to Evaluate the Safety of MEDI8897 for the Prevention of Medically Attended Respiratory Syncytial Virus (RSV) Lower Respiratory Track Infection (LRTI) in High-risk Children. https://clinicaltrials.gov/ct2/show/NCT03959488 (MEDLEY). Accessed
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