Zika virus – Incidence and trends
To date, 45 countries and territories have confirmed local, vector-borne transmission of Zika virus disease in the Region of the Americas since 2015. 1 In addition, five countries in the Americas have reported sexually transmitted Zika cases.2 Since the last Zika Epidemiological Update of 11 August 2016, no additional countries or territories in the Americas have confirmed vector-borne autochthonous transmission of Zika virus
North America
Mexico is showing a downward trend in the number of confirmed cases. In the coming weeks, it will be important to monitor the spread of the disease to determine whether the observed downward trend will continue. In the United States of America, the area of Zika transmission continues to expand in Miami-Dade County and the Florida Department of Health has confirmed an autochthonous case of Zika virus infection. Both counties are in the state of Florida.
Central America
With the exception of Costa Rica and Nicaragua, countries in Central America show a decreasing trend of cases over the previous four weeks. The greatest increase in Zika cases in Central America occurred between late 2015 and early 2016
Caribbean
In the Caribbean, Saint Barthelemy and Puerto Rico continue to show an increasing trend of Zika cases; however, in other Caribbean countries and territories, the trend is declining. In the following weeks, it will be necessary to monitor the evolution of the outbreak to confirm whether the declining trend will continue.
South America
In South America, all countries are reporting decreasing numbers of Zika cases.