When in areas with Zika and other diseases spread by mosquitoes, take the following steps[PDF - 2 pages]:
Even if they do not feel sick, travelers returning to the United States from an area with Zika should take steps to prevent mosquito bites for 3 weeks. These steps will prevent them from passing Zika to mosquitoes that could spread the virus to other people.
(Information from the Centers for Disease Control and Prevention - July 2016)
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