ALT Magnified Listeria bacteria, with text saying “Listeria outbreak. If you are pregnant, aged 65 or older, or have a weakened immune system: Contact your healthcare provider if you have any Listeria symptoms. Pregnant people usually have fever, muscle aches, and tiredness. People who are not pregnant usually have fever, muscle aches, and tiredness. They may also get a headache, stiff neck, confusion, loss of balance, or seizures. The source of the outbreak has not yet been identified. Investigators are collecting more information to solve this outbreak. cdc.gov/foodsafety/outbreaks.”