Respiratory syncytial virus (RSV) is a common virus. It infects the airways. In adults and older children, it tends to cause mild symptoms like a cold. Most people recover in a week or two. But RSV can be serious. Babies are more likely to get severe RSV and need hospital care.
The CDC advises an RSV vaccine for babies called nirsevimab. This vaccine is used to prevent severe RSV disease in babies. It has an RSV monoclonal antibody. It's given as a shot (injection). It's for babies who are:
- Age 8 months or less.
- Born in or before their first RSV season.
- Born to someone who did not have the RSV vaccine in pregnancy.
The vaccine is also advised if:
- The mother's RSV vaccine status is not known.
- The baby was born within 14 days of the mother's RSV vaccine.
Most babies born to those who got the RSV vaccine don't need to get nirsevimab too.
Nirsevimab may also be advised for some high-risk babies and children ages 8 months to 19 months.