Soft cheeses, frozen breakfast foods, smoked salmon and other products have been recalled for potential listeria contaminations in the last month.

On Friday, the CDC said that 11 people have been infected with listeria across four states. Out of the cases, nine have been hospitalized and one has died.

The infant killed was a twin whose sibling also died, but whose death could not be linked to listeria. Their pregnant mother was also sick, but recovered, the CDC said.