The Wall Street Journal: Officials probing possible cluster of Zika cases in Miami Beach

MIAMI BEACH, Fla.—Health officials are investigating a cluster of possible Zika cases in Miami Beach, suggesting that transmission of the virus by mosquitoes is more widespread in one of the nation’s more populous counties than originally thought, and that efforts to contain it are falling short.

At least one other area of Miami-Dade County is also under investigation for a possible cluster of mosquito-borne transmission of Zika, according to people familiar with the investigations.

The revelations come after Florida health officials had identified one neighborhood north of downtown Miami as a transmission zone.

Health officials are likely now to expand that zone, where they have warned the public that mosquito-borne transmission of Zika is occurring, but it wasn’t clear how large the new zone will be, these people said.

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