UTAH COUNTY, Utah (ABC4) — The Utah Department of Agriculture and Food (UDAF) have issued an advisory for frozen oysters after a norovirus outbreak in Utah County.

On August 18, 2025, some frozen half-shell oysters tested positive for norovirus. As a result, the Utah Department of Agriculture and Food (UDAF) has issued an advisory warning and has expanded previous recalls for oysters.

Previously, on July 24, the UDAF issued a recall for any Korean frozen half shell oysters from Designated Area No. 1 that were harvested between December 30, 2024, and February 6, 2025. Some restaurants in Cache, Davis, Salk Lake, and Utah counties received those products.

Norovirus has since been identified in additional oyster lots, and that recall notice has been expanded for any Korean frozen half-shel

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