Authorities try to reassure public after Zika virus spreads to US mainland

Sat, Jul 30: Mosquitoes are apparently now spreading the Zika virus on the U-S mainland for the first time. Health officials in Florida say there are four cases in Miami where the infected people are believed to have contracted the virus locally through mosquito bites. Authorities say they do not expect widespread outbreak, and are trying to reassure tourists there’s no danger. Jennifer Johnson reports.

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