Twelve deaths have been reported as part of an outbreak of Listeria monocytogenes infections linked to frozen supplemental shakes, the US Food and Drug Administration said Monday. At least 38 people in 21 states had been infected,

Recalled supplemental shakes were distributed to hospitals and long-term care facilities nationwide, federal officials say.

According to a CDC food safety alert, an outbreak of Listeria infections has affected 38 people across 21 states. Of those infected, 37 have been hospitalized, and 12 have died.