Key West

On November 19, the Florida Keys Mosquito Control District board voted to approve a trial of genetically modified (GM) mosquitoes designed to fight the Zika virus in the Keys.
Key West Source: Tampa Bay Times
The district has been working with British biotech company Oxitec for the last 5 years to get federal approval for a trial release of the genetically engineered male Aedes aegypti mosquitoes into the wild. When they mate with female Aedes aegypti mosquitoes, their offspring die.

As health officials predicted, the Zika virus is beginning to spread across south Florida, and now a type of genetically modified (GM) mosquito designed to fight the virus has been approved by the Food and Drug Administration (FDA). [1]

Genetically modified mosquitoes designed to limit the spread of the Zika virus will likely soon be unleashed in the southern United States, as the federal government said today decided to permit a field test in the Florida Keys.
The Food and Drug Administration (FDA) said it had made a preliminary determination that the GM mosquitoes are unlikely to harm humans, animals, or the environment.