What is RSV?
RSV (Respiratory Syncytial Virus) is a common virus that can cause cold-like symptoms. In babies and young children, RSV can sometimes lead to serious illnesses like pneumonia or bronchiolitis.
Why should I be concerned about RSV?
Most children get RSV by age 2, but some infants and young kids can get very sick. They may need to go to the hospital for breathing support. Babies younger than 6 months are at highest risk.
How can I protect my baby from RSV?
There are two main ways:
- During pregnancy: Mothers can get the RSV vaccine (called Abrysvo) between weeks 32 and 36 of pregnancy. This helps pass protection to the baby before birth.
- After birth: Babies can get a protective shot called an RSV antibody (nirsevimab or clesrovimab) to help their bodies fight the virus.
Does my baby need both the vaccine and the antibody?
Most babies only need one form of protection.
- If mom got the RSV vaccine during pregnancy, the baby usually does not need the antibody.
- If mom didn’t get the vaccine during current pregnancy, or if the baby was born less than 2 weeks after the vaccine, then the baby should get the antibody.
When do babies get the RSV antibody?
In most parts of the U.S., RSV season runs from October through March.
- Babies born during this time should get the antibody within the first week of life, ideally before leaving the hospital.
- Babies born before RSV season can get the antibody in early fall (October–November).
Do older babies or toddlers need protection?
Some children ages 8–19 months may need the antibody before their second RSV season, especially if they:
- Were born very early (premature) and still need breathing support,
- Have certain lung or heart problems,
- Have weakened immune systems, or
- Are American Indian or Alaska Native.
Is the RSV vaccine safe during pregnancy?
Yes. The most common side effects are mild, such as arm soreness, headache, or muscle aches. Studies show it helps protect babies from serious RSV illness.
Is the RSV antibody safe for babies?
Yes. The antibody is not a vaccine but works in a similar way to protect against RSV. Most side effects are mild, such as pain or redness at the injection site.
Can the RSV antibody be given with other vaccines?
Yes. It can be given at the same time as routine childhood vaccines.
What else can I do to reduce my baby’s risk of RSV?
- Wash your hands often.
- Limit close contact with sick people.
- Clean toys and surfaces regularly.
- Avoid smoke exposure.
- Keep babies away from crowded places during RSV season when possible.
Where can I get more information?
- Talk to your child’s doctor or nurse.
- Visit the CDC page on RSV
- Healthy children organization, RSV: When It’s More Than Just a Cold
- Pediatric Pandemic Network, Protect Your Family and Community: Essential Tips for Staying Healthy During Respiratory Illness Season