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flag Infants safely gain strong RSV protection from nirsevimab at birth, even if mothers were vaccinated.

flag A new study presented at IDWeek confirms that infants can safely receive the RSV antibody shot nirsevimab after birth, even if their mothers were vaccinated during pregnancy. flag Analyzing 181 mother-infant pairs, researchers found high RSV antibody levels in all babies, with no serious side effects reported. flag The shot significantly boosted protection—25-fold in unvaccinated mothers’ babies versus over three-fold in vaccinated mothers’ babies. flag Findings support combining maternal and infant RSV prevention strategies, reinforcing CDC recommendations. flag The study is ongoing, with plans to monitor antibody durability and levels in breast milk over a year.

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