Rare Zika Complication Hits 30 in Puerto Rico; CDC Expects More

Guillain-Barre is a rare complication of many different types of infections. It's a usually temporary paralysis that can become serious if people's breathing muscles become affected. With treatment, most patients recover.

Thirty people have been diagnosed with a rare paralyzing condition caused by Zika virus infection in Puerto Rico, the territory's health department said Thursday.

And Centers for Disease Control and Prevention director Dr. Thomas Frieden says he expects even more cases of Guillain-Barre syndrome in Puerto Rico because the virus is infecting so much of the population, NBC News reported. 

"We think there will be as many as 200 additional cases, given the overall number of infections there," Frieden told NBC News.

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