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ORLANDO, Fla. (AP) – Orlando’s major theme parks are now offering free bug repellant to visitors as concerns about mosquito-transmitted Zika virus mount in Florida.

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Walt Disney World, Universal Orlando Resort and SeaWorld Orlando on Sunday began offering the mosquito spray and lotion free of charge at their parks.

No mosquito-transmitted case of the Zika virus has been found in central Florida. But theme park officials say they’re offering the repellant as a precaution and to ease the fears of visitors.

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The Department of Health is investigating mosquito-transmitted Zika cases in Miami-Dade and Palm Beach counties in South Florida, as well as in Pinellas County in the Tampa area.

Zika causes a mild illness in most people but can lead to severe brain-related birth defects if women are infected during pregnancy.

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