The number of cases of infant botulism tied to a recalled formula has increased.

Now, there are 31 cases across 15 states tied to the recalled ByHeart Whole Nutrition Infant Formula products, according to the U.S. Food and Drug Administration.

ByHeart has since recalled all batches of the ByHeart Whole Nutrition Infant Formula cans and single-serve “anywhere pack” sticks.

"We continue to urge parents and caregivers to stop using ByHeart formula immediately," the company stated in an Instagram post . "Monitor your child for symptoms of infant botulism and seek medical care immediately if they develop symptoms."

Here's what to know about the recall.

When was the ByHeart formula recall first announced?

The U.S. Food and Drug Administration first announced the voluntary recall o

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