The frozen shakes were served at hospitals and long-term care facilities, sickening 38 people and resulting in 11 deaths in 21 states, according to the FDA.

Frozen supplemental shakes sold to hospitals and long-term care facilities in 21 states, including Florida, are making people sick and already have led to 12 deaths.

Supplemental shakes have been linked to a deadly listeria outbreak. They were distributed in hospitals and long-term care facilities.