"They are all active Zika cases, and have not exhibited symptoms to be admitted to the hospital," he said. Officials had been testing mosquitoes in the small area of southern Florida where the cases are located "for about two weeks," he added. "At this time, the department believes that active transmission of the Zika virus is occurring in one small area in Miami-Dade County, just north of downtown," it added. The health department had urged residents and visitors to participate if asked for urine samples in the areas being investigated, to help determine the number of people affected. MIAMI - Florida health officials said Friday they believe that four people have been infected locally with Zika, in what would be the first evidence that mosquitoes carrying the virus are present in the continental United States.

Source: Bangkok Post July 29, 2016 14:48 UTC