Consumption of food contaminated with Listeria monocytogenes can cause listeriosis, a serious infection that can cause fever, muscle aches, headache, stiff neck, confusion, loss of balance and convulsions.
—
Asuka Koda,
CNN Money,
30 Oct. 2025
Meanwhile, there are dozens of viruses and bacteria that can cause flu-like symptoms — such as fever, chills, cough, body aches and headaches — including enterovirus, parainfluenza and more.
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