Sanofi announced it will begin shipping Beyfortus (nirsevimab) starting in early Q3 to ensure broad availability well ahead of the 2025-2026 respiratory syncytial virus (RSV) season, which typically starts in November and runs through March. Immunizations begin in early fall and these advance shipments provide confidence for healthcare providers to support their efforts. Demand has continued to increase since the launch of Beyfortus, the only option that can offer RSV protection designed for all infants with proven high, sustained efficacy through a typical RSV season and an unparalleled body of real-world evidence.
Sanofi, in collaboration with its partner AstraZeneca, has tripled production capacity and doubled the number of manufacturing sites since the launch of Beyfortus in 2023. Current supply for the upcoming season already matches the total doses distributed last year and production continues. Last season in the US, enough doses were produced to cover every infant — a benchmark that reflects both Sanofi’s and AstraZeneca’s global commitment to ensuring timely access for all infants.
This year’s EU shipments are marked by an important change to the Beyfortus EU label extending the duration of protection through six months, so Beyfortus can continue to offer season-long protection for all infants, including older babies immunized just before the RSV season begins. More than six million babies have been immunized worldwide and millions more will be immunized this season in more than 40 countries to help protect them from the potentially devastating impact of RSV disease.
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