Nirsevimab Effectiveness Against Intensive Care Unit Admission for Respiratory Syncytial Virus in Infants - 24 States, December 2024-April 2025

Published on November 20, 2025

This report describes a multicenter case-control investigation that found nirsevimab was 80% effective at preventing RSV-associated ICU admissions among infants.

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Attributes and principles of genomic data-sharing platforms supporting surveillance of pathogens with epidemic and pandemic potential

November 17, 2025
OverviewSharing pathogen genome data and associated metadata is critical for preventing, detecting, and responding to epidemics and pandemics at national and international levels, and is also important for monitoring and responding to endemic diseases. WHO encourages timely sharing of pathogen genome data on publicly accessible platforms according to the guiding principles published in 2022. Patho

Notes from the Field: Outbreak of Escherichia coli O157:H7 Infections Linked to Organic Walnuts - Washington and California, 2024

November 26, 2025
This report describes CDC's multistate investigation to confirm the genetic relatedness of infections in an E. coli outbreak linked to walnuts and identify additional cases.