Zika is a mosquito-borne virus that is especially dangerous for pregnant women. The most common symptoms are fever, rash, joint pain and headache.

>>Read more about the Zika virus here

The little-known virus re-emerged in Brazil in 2015. Cases have been confirmed throughout South and Central America as well as Puerto Rico.

In the U.S., cases have been confirmed in 11 states including three women in Florida; two women in Illinois and a woman in Hawaii who gave birth to a child who contracted the virus and was born with an unusually small head.

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Braves first baseman Matt Olson (left) is greeted by Ronald Acuña Jr. after batting during the MLB Home Run Derby as part of the All-Star Game festivities on Monday, July 14, 2025, at Truist Park in Atlanta. (Jason Getz/AJC)

Credit: Jason Getz/AJC