Cases have been reported in 21 states, including California, Connecticut, Florida, Illinois, Michigan, and more. The affected shakes were sold primarily to long-term care facilities. Lyons Magnus LLC has voluntarily recalled the shakes,

The Food and Drug Administration has issued an urgent warning about a listeria outbreak linked to meal supplement shakes served in hospitals and long-term care facilities, including those in Florida.

Here is what you need to know about the deadly listeria outbreak, including which products are being recalled.

Two Connecticut residents were infected by listeria connected to the supplemental milkshakes, but have since recovered.