Several factors were associated with high maternal uptake of the vaccine, including older age of the mother.
Researchers say interventions to reduce RSV infections, like vaccines and monoclonal antibodies, could aid antibiotic stewardship efforts.
The vaccine had a similar favorable safety profile as a placebo.
The CDC says it's now classifying the flu season as high severity for all age-groups for the first time since the 2017-18 season.
Test positivity topped 30%, with steady rises in emergency department visits and hospitalizations.
Median hospital stay was longer in the RSV group than in flu patients.
Sixteen more flu deaths were reported in children, with virus activity at high or very high flu levels across much of the nation.
By 180 days, the COVID-19 death rate reached 3.1% in the 2022-23 season and 2.9% in the 2023-24 season.
Test positivity for flu rose to 25%, with emergency department visits very high and affecting all age-groups.
Estimated effectiveness against infection was 72% in veterans aged 80 and older and 72% in those with weakened immune systems.
