Nearly two dozen babies in 13 states have been sickened in a growing outbreak of infantile botulism linked to recalled ByHeart infant formula, federal health officials said Friday.

The U.S. Food and Drug Administration 23 cases of confirmed or suspected illness in babies who consumed ByHeart formula since August. That's an increase of 10 babies treated for the rare and potentially deadly disease since the outbreak was announced Nov. 8. The most recent case was reported on Nov. 11.

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