FDA's approval is for use of the vaccine, called Abrysvo, at 32 to 36 weeks gestational age of pregnancy.
About a fourth (24%) of those receiving ICU treatment required invasive mechanical ventilation for a median of 6 days.
The survey findings come ahead of a future recommendation for pregnant women as a strategy to protect babies.
The CDC is recommending a dose of the monoclonal antibody nirsevimab to protect against severe illness caused by RSV.
In the small phase 1 study, children received a single dose of the live attenuated nasal vaccine.
The rates the researchers saw could serve as a baseline for gauging whether coinfections rates are shrinking or growing.
Twelve fur farms in Finland have now been affected by H5N1 avian flu outbreaks.
The drug is indicated for babies entering their first RSV season and for kids up to 2 years old who remain vulnerable in their second season.
The recommendation stipulates that people can get a single dose of the vaccine based on shared clinical decision making, meaning it isn't recommended for everyone in the age group.
ACIP recommends newly approved RSV vaccines for use in two older age-groups, people ages 60 to 64 and those ages 65 and older.