Beyfortus (nirsevimab) RSV immunoglobulin 

Protecting Your Baby from RSV This Winter
Respiratory syncytial virus (RSV) is a common seasonal virus that can cause serious breathing illness in babies. Each winter it sends thousands of infants to the hospital. The good news: a single antibody injection can now give your baby strong protection during their most vulnerable months.
East Bay Pediatrics is proud to offer Beyfortus (nirsevimab) right here in our office.
What is Beyfortus?
Beyfortus is a one-time injection that delivers ready-made antibodies to fight RSV. Because it provides these antibodies directly, protection begins quickly and lasts through the RSV season.

​Our goal is simple: keep babies healthy and out of the hospital during the winter virus season.
When is it given?
RSV season runs October through March. We recommend the injection for:
  • All babies under 8 months old entering or born during their first RSV winter.
  • High-risk children 8 to 19 months old entering their second RSV winter. This includes children with chronic lung disease of prematurity, significant congenital heart disease, cystic fibrosis, a weakened immune system, and American Indian or Alaska Native children.
Babies born during the season can receive it as early as their first week of life.
Is it safe?
Yes. Beyfortus has been shown to be safe in clinical trials, with few side effects. As a simple precaution, we'll have you and your baby stay in the office for 15 minutes after the injection. Real-world studies show it lowers the chance of RSV hospitalization by roughly 80%.
For full safety details, visit: https://www.beyfortus.com/#important-safety-information
Already protected during pregnancy? Your baby may not need this shot.
In 2023, an RSV vaccine for pregnant women became available. We encourage expectant mothers to ask their OB about Abrysvo, given between weeks 32 and 36 of pregnancy, which passes protective antibodies to the baby before birth.
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If you received Abrysvo during pregnancy, your baby usually does not need the Beyfortus injection. One or the other provides protection — not both.
A note for grandparents
Please don't confuse the maternal vaccine with Arexvy, the RSV vaccine for adults 60 and older. Grandparents can get Arexvy to protect themselves, but it does not pass protection to the baby.
What about Synagis?
​Certain high-risk infants — such as those born significantly premature or with congenital heart disease or chronic lung disease — may still qualify for Synagis (palivizumab), a monthly RSV antibody injection. Synagis requires insurance prior authorization. Our team can help determine if your child qualifies.
Our commitment
East Bay Pediatrics strongly supports protecting every child from preventable illness. We're excited to offer this important tool to help keep our smallest patients safe and healthy all winter long.
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Have questions?
​Call our office — we're happy to help you decide what's right for your baby.