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Pregnant Women and Women of Reproductive Age for Zika Virus Infection Related to the Ongoing Investigation of Local Mosquito-borne Zika Virus Transmission in Miami-Dade County, Florida

CDC previously issued travel, testing, and other guidance related to local mosquito-borne Zika virus transmission (active Zika virus transmission) that the Florida Department of Health (FL DOH) identified in two areas of Miami-Dade County: (1) a one-square-mile area in Wynwood, and (2) a 1.5-square-mile area in Miami Beach. CDC has updated the guidance for people who live in or traveled to these areas.

 

FL DOH continues to investigate active Zika virus transmission in South Florida. Investigation has shown an expanded area of active transmission in Miami Beach, now measuring 4.5 square miles, which includes the original 1.5-square-mile area.

The FL DOH has determined that active Zika virus transmission is no longer ongoing in the one-square-mile area of Wynwood after three mosquito incubation periods have passed without any new cases of local transmission. As of September 19, 2016, CDC has modified recommendations for the Wynwood area. CDC no longer recommends pregnant women and their partners avoid travel to the Wynwood area. However, pregnant women and partners of pregnant women who are concerned about potential Zika virus exposure may consider postponing nonessential travel to all parts of Miami-Dade County, including areas without identified active transmission. For all of Miami-Dade County, CDC advises strict adherence to precautions to prevent mosquito bites. 

 

Because the incubation period for Zika virus infection is up to two weeks and many people infected with Zika virus won’t have symptoms or will only have mild symptoms, it is likely that there are additional people infected in the population. In addition, because the diagnosis and investigation of cases may take several weeks, coupled with additional cases of local mosquito-borne Zika virus infection and increase in travel-related cases in Miami-Dade County, it is possible that other neighborhoods besides Miami Beach in Miami-Dade County have active Zika virus transmission that is not yet apparent. 

 

For the newly expanded area of active transmission in Miami Beach, CDC advises that the recommendations outlined below be followed. As outlined in prior guidance, based on the earliest time of symptom onset and a maximal two week incubation period for Zika virus infection, these recommendations apply to pregnant women, women of reproductive age, and their partners who live in or traveled to the designated 4.5-square-mile area of Miami Beach after July 14, 2016. 

 

This is an ongoing investigation, and FL DOH and CDC are working together to rapidly learn more about the extent of active Zika virus transmission in Miami-Dade County. CDC will update these recommendations as more information becomes available.


Read the full CDC HAN Alert

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