Nirsevimab, sold under the brand name Beyfortus, is a human recombinant monoclonal antibody with activity against respiratory syncytial virus (RSV).[10][11] It is a respiratory syncytial virus (RSV) F protein‑directed fusion inhibitor[6] that is designed to bind to the fusion protein on the surface of the RSV virus.[12][13]
The most common side effects are rash, fever and injection site reactions (such as redness, swelling and pain where the injection is given).[8][14][15]
It was developed by AstraZeneca and Sanofi.[10][11] Nirsevimab was approved for medical use in both the European Union[9][16] and the United Kingdom in November 2022,[5] in Canada in April 2023,[2][17] and in the United States in July 2023.[15] Alternatively, in October 2023 the CDC recommended maternal RSVpreF vaccination during pregnancy, though both are not needed in most infants.
^ ab"Beyfortus APMDS". Therapeutic Goods Administration (TGA). 8 December 2023. Archived from the original on 7 March 2024. Retrieved 7 March 2024.
^ ab"Beyfortus EPAR". European Medicines Agency. 23 June 2023. Archived from the original on 1 August 2023. Retrieved 6 August 2023. Text was copied from this source which is copyright European Medicines Agency. Reproduction is authorized provided the source is acknowledged.
^ abCite error: The named reference EU Union Register was invoked but never defined (see the help page).