The CDC says regardless of the expiration date the cereal should be thrown away immediately or returned for a refund.
The FDA said on Thursday it would follow up with retailers to prevent the sale of the product.
The warning came less than a month after the company launched an investigation with the third-party manufacturer who produces the cereal after being contacted by the Food & Drug Administration and CDC regarding reported illnesses. By June 14, Kellogg's issued a recall order on the product.
In addition, the agency has advised the public to report any sales of the cereal to the FDA Consumer Complaint Coordinator in their area.
"All Honey Smacks cereal was recalled in June 2018".
The cereal is the likely source of the salmonella outbreak, the CDC said. "The FDA has become aware that recalled Kellogg's Honey Smacks cereal are still being offered for sale". Florida has two people sick.
The CDC says 100 salmonella infections in 33 states have now been linked to Honey Smacks. A case count map breaks down the location and prevalence of cases, the first of which was reported in early March.
Laboratory testing also identified the outbreak strain in samples of leftover Kellogg's Honey Smacks cereal collected from the homes of ill people in Montana, New York, and Utah, the FDA reported. While most recover within a week, some illnesses can last longer and be more severe. However, people in high-risk groups, which include children, older adults, pregnant women and anyone with a compromised immune system can develop serious complications which require hospitalization.