The CDC has declared that an outbreak of cronobacter infections among babies is over, but the Food and Drug Administration is continuing its investigation into the maker of the implicated infant formula.

The FDA received four complaints of cronobacter infections in infants beginning on Sept. 20, 2021, and running through Jan. 11, 2022. Two of the infected babies died. Parents of all four infants reported having fed their children formula produced by Abbott Nutrition before they became ill.

The Centers for Disease Control and Prevention worked with the FDA and state health departments to investigate the outbreak. The FDA began an investigation into Abbott’s Sturgis, MI, production facility and the plant remains closed while the investigation continues. Although five strains of…