Notes from the Field: Genomic and Wastewater Surveillance Data to Guide a Hepatitis A Outbreak Response - Los Angeles County, March 2024-June 2024

Published on February 20, 2025

This report describes significant increase in hepatitis A virus (HAV) wastewater concentrations during an HAV outbreak in Los Angeles County, California.

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First Clade Ib Monkeypox Virus Infection Reported in the Americas - California, November 2024

February 13, 2025
This report describes the first reported case of clade Ib monkeypox virus infection in the United States.

Reports of Encephalopathy Among Children with Influenza-Associated Mortality - United States, 2010-11 Through 2024-25 Influenza Seasons

February 27, 2025
This report describes cases of influenza-associated encephalopathy or encephalitis among children during 2010-11 through 2024-25 flu seasons.