Respiratory syncytial virus (RSV) is circulating later into the spring than usual, leading most states to extend the immunization window for eligible infants and toddlers. Health officials are expanding access to passive and active RSV protections to reduce severe illness among the youngest children. This shift adds urgency to broader respiratory virus monitoring as flu and COVID continue to circulate and overlaps with parental hesitancy around routine newborn care could limit uptake of recommended protections.
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