A norovirus outbreak linked to oysters sickened at least 80 people who attended an event celebrating The Los Angeles Times’s annual list of the 101 best restaurants in the city, local health officials said this week.

Hundreds of guests attended the 101 Best Restaurants event at the Hollywood Palladium on the evening of Dec. 3, where some of Southern California’s most acclaimed restaurants and bars served food and drinks from the city’s diverse culinary scene.

The Times used the event to unveil its annual guide to the 101 Best Restaurants, which it first published in 2013, when the list was chosen by the newspaper’s Pulitzer Prize-winning restaurant critic Jonathan Gold, who died in 2018.

In a statement on Thursday, the Los Angeles County Department of Public Health said that it was “investigating a norovirus outbreak associated with oysters that were served at an event on Dec. 3, 2024.”

“At this time, over 80 attendees that consumed the oysters have reported illness, a majority with gastrointestinal symptoms that include diarrhea, nausea, abdominal pain and vomiting,” the department said. It said that some people had been hospitalized but did not say how many.

Mark Kapczynski, 54, who lives in Sherman Oaks, Calif., and runs a business consulting firm, said he attended the event with his wife after buying two V.I.P. tickets for close to $350 each. General tickets cost $159.