For decades, Zika was considered a mild virus that rarely made people ill. Suddenly it seems to be causing serious problems and is spreading across the Americas. Here's the latest news.
Renee Montagne talks to Professor Duane Gubler, who has studied previous outbreaks of the Zika virus. He says if we had paid closer attention to them, Zika might not be at epidemic proportions now.
The islands saw the world's largest outbreak before Brazil: 20,000 cases. It may have been linked to birth defects — research is still being done. And in 2014 it seemed to disappear.
Hawaii has nearly 250 confirmed cases of the mosquito-borne virus since September 2015. State health officials say dengue symptoms include fever, rash, severe headaches and eye, joint and muscle pain.
And 60 million of the cases are in Indonesia, which was added to the survey for the first time — evidence that FGM goes far beyond Africa and the Middle East.
When it comes to talking about infectious diseases, researchers have their own special jargon. But even they aren't always 100 percent sure of the definitions.