Beyfortus® (nirsevimab-alip) 50 mg and 100 mg information for OBGYNs
Fast-acting passive immunization to help prevent respiratory syncytial virus (RSV) disease, that lasts through 5 months, a typical RSV season¹⁻³*
Beyfortus is the first and only long-acting antibody indicated for the prevention of RSV lower respiratory tract disease in¹:
- Neonates and infants born during or entering their first RSV season
- Children up to 24 months of age who remain vulnerable to severe RSV disease through their second RSV season
Recommendations
ACOG guidelines state that clinicians should counsel patients regarding the monoclonal antibody, Beyfortus, as another option for newborns if the maternal RSV vaccine is not received during pregnancy.⁴†
- When possible, discussions regarding Beyfortus should include information about whether it will be available to the baby after birth
Infants <34 weeks⁴
Infants born at <34 weeks should receive Beyfortus regardless of maternal vaccination status.
Infants at risk⁴
Infants born to mothers who still need RSV vaccination ≥14 days before birth may receive Beyfortus based on clinical judgment.
CDC/ACIP recommends Beyfortus for infants born before the RSV season, as well as those born during the season when⁵
- The mother did not receive the RSV maternal vaccine, or
- The mothers vaccination status is not known, or
- The window between maternal vaccination and birth was <14 days, or
- The healthcare provider determines the incremental benefit of Beyfortus is warranted because the infant is at increased risk, or when there are concerns about the adequacy of the maternal immune response or placental antibody transfer.
Beyfortus recommendations by CDC/ACIP and AAP⁶⋅⁷
First RSV season
Infants aged <8 months born during or entering their first RSV season are recommended to receive 1 dose of Beyfortus (50 mg for infants <5 kg and 100 mg for infants ≥5 kg)⁶ :
Refer to the most current CDC immunization schedule for additional immunization considerations
Infants aged <8 months born during or entering their first RSV season are recommended to receive 1 dose of Beyfortus (50 mg for infants <5 kg and 100 mg for infants ≥5 kg)⁶ :
- For babies born before the season, providers should target administration shortly before the start of the season for infants aged <8 months
- For babies born during the season, Beyfortus should be administered within 1 week of birth, which can be during the birth hospitalization or in the outpatient setting
Refer to the most current CDC immunization schedule for additional immunization considerations
Supply update for 2024/2025: With AstraZeneca, we are expanding the Beyfortus manufacturing network to allow for a significant increase in supply for the coming RSV season to cover the entire US demand
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