Recent cases of Zika virus are prompting the U.S. Centers for Disease Control and Prevention (CDC) to, for the first time, warn people about traveling to an area within the continental United States.
So far, 15 people in Florida were found to have been infected with Zika virus after being bitten by local mosquitoes. Miami health officials believe mosquitoes spread the virus, most likely by biting a person who had returned to the United States with the disease.