The Department of Health and Human Services confirmed the first human case of a flesh-eating parasite in the U.S. Here's what you need to know about New World screwworm.

"The risk to public health in the United States from this introduction is very low," said HHS spokesperson Andrew Nixon.

The first case in years of New World screwworm infesting a human has been detected in the U.S. The infestation was detected in a person who had recently traveled to El Salvador and is being examined by the Maryland Department of Health and the U.