What ended the ByHeart botulism outbreak?

CDC declares outbreak over while investigation continues

U.S. public‑health officials have formally said the botulism outbreak linked to ByHeart baby formula is over. The Centers for Disease Control and Prevention has closed the active outbreak phase, indicating that no new confirmed cases directly tied to the batch or distribution window were being reported.

That declaration does not end federal inquiries. Investigators from public‑health agencies and other federal partners are continuing a probe to determine how contamination occurred, whether production or raw materials were responsible, and if gaps in safety protocols need fixing. Authorities are also examining distribution chains to understand the scope of exposure and to confirm that recalls and mitigation measures removed affected product from the market.

Key takeaways for families and providers:

• Follow recall notices and throw out or return any product identified by lot number.
• Seek immediate medical attention if an infant shows symptoms consistent with botulism.
• Keep receipts or lot information to assist public‑health follow‑up.

Health officials emphasize that declaring the outbreak over refers to the immediate cluster of linked cases; it does not mean every question about cause or responsibility has been resolved. The ongoing probe will inform whether regulatory changes, additional recalls, or enforcement actions are warranted. Meanwhile, manufacturers and public‑health bodies are monitoring supply and safety signals to prevent future incidents.