Zika may be linked to a disorder that can damage the spinal cord, a leading administration official said.

"We are starting to see [the disorders], but we don't know how frequent it is going to be, but at least we have seen them and that is concerning," said Anthony Fauci, director of the National Institutes of Health's Institute of Allergy and Infectious Diseases, on "Fox News Sunday."

The federal government already confirmed a link between Zika and the birth defect microcephaly. It is studying a similar link between the mosquito-borne virus and the neurological disorder Guillain-Barre Syndrome, which can cause temporary analysis.

Now officials are seeing cases of another disorder called acute myelitis, which causes inflammation of the spinal cord and paralysis.

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