FDA approves AstraZeneca’s RSV monoclonal antibody treatment for infants
18 Jul 2023
Drug ApprovalClinical ResultPhase 3Vaccine
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Source: Pharmaceutical Technology
Akosua Mireku
@AkosuaMireku1
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Source: Pharmaceutical Technology
Prior to Beyfortus’ approval, the only approved RSV preventative antibody treatment for infants was AbbVie’s Synagis (palivizumab). Credit: GOLFX via Shutterstock
The US Food and Drug Administration (FDA) has approved AstraZeneca and Sanofi’s Beyfortus (nirsevimab), a form of passive immunisation for infants born during or entering their first RSV season.
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The therapy can also be given to infants up to 24 months of age who are vulnerable to severe RSV disease through their second RSV season.
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Beyfortus is an intramuscular monoclonal antibody therapy that acts by neutralising the RSV-F protein. This prevents the unfolding of the protein, blocking viral entry.
The antibody’s approval is based on data from three clinical studies (trials 03, 04 and 05) and a positive recommendation from a 9 June FDA Advisory Committee meeting. The European Medicines Agency approved the prophylactic treatment in October 2022. Regulatory authorities in China, Japan and several other countries are also assessing the therapy.
Prior to Beyfortus’ approval, the only approved RSV preventative antibody treatment for infants was AbbVie’s Synagis (palivizumab), which was approved in 1998. However, AstraZeneca’s newly approved medicine is the first preventative option that specifically protects the broad infant population through its first RSV season.
In a February 2023 email interview with Pharmaceutical Technology, Nancy Jaser, a senior infectious disease analyst at GlobalData, predicted that upon its approval, Beyfortus would replace Synagis as the standard of care passive immunisation for paediatric RSV patients.
Beyfortus’s approval follows the FDA approval of the first RSV vaccine for older adults, GSK’s Arexvy. Patients aged 60 years and above are eligible to take the immunisation. This was followed a few weeks later by approval for Pfizer’s RSV vaccine Abrysvo, intended for the same population of individuals aged 60 years and above.
Phase II data from Trial 03 (NCT02878330) demonstrated that infants treated with Beyfortus had a 6.9% lower incidence of medically attended RSV lower respiratory tract infection (MA RSV LRTI). It also demonstrated that Beyfortus decreased the risk of MA RSV LRTI by approximately 70% relative to placebo. In the Phase III (MELODY) Trial 04 (NCT03979313), this increased to 75% efficacy compared to placebo. Data was taken from the Phase II/III (MEDLEY) Trial 05, showing that the drug had a favourable safety profile.
GlobalData is the parent company of Pharmaceutical Technology.
According to GlobalData, the only other RSV monoclonal antibody antiviral in Phase III trials is Merck’s clesrovimab. Merck is investigating the drug in a Phase II/III (NCT04767373) and a Phase III (NCT04938830) study.
In a press release, AstraZeneca’s executive vice president Iskra Reic said: “Beyfortus represents an opportunity for a paradigm-shift in preventing serious respiratory disease due to RSV across a broad infant population in the US.”
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2021 was a year of continued innovation and change in the Biopharmaceutical industry. As the COVID-19 pandemic continues to take its toll on businesses worldwide, it’s time to look for new ways to create value, prepare for the future, and remain competitive in the ever-changing landscape.
GlobalData’s expansive report examines the business environment and trends that shape the Biopharmaceutical industry. We highlight the most impactful emerging technologies, as well as the industry, regulatory, and macroeconomic factors that influence growth prospects.
Access the report to:
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