An ongoing Listeria outbreak has mostly affected people living in long-term care facilities and people who were already hospitalized prior to becoming sick from the infection.

The supplemental shakes are labeled under the brands Lyons ReadyCare and Sysco Imperial and were sold to institutional customers, including hospitals and long-term care facilities, officials said.

A deadly listeria outbreak linked to frozen supplemental shakes has prompted a nationwide recall after infecting 38 people, including 12 who died, the FDA reported on Monday. The shakes, manufactured by Prairie Farms Dairy in Fort Wayne,