Listeria Outbreak 2024 Symptoms. What to know about symptoms and how to stay safe Epidemiologic and laboratory data now show that meats sliced at deli counters, including boar's head brand liverwurst, are contaminated with listeria and are making people sick.
Symptoms of severe illness usually begin one to four weeks after eating the contaminated food but can present as early as the same day, or as late as 70 days later, the cdc said. As of july 26, 2024, a total of 34 people infected with the outbreak strain of listeria have been reported from 13 states (see map).