A widespread epidemic of the infection was ongoing in the Americas in 2016. Four people in Miami-Dade area were infected with Zika – the first known cases of the virus being transmitted by mosquitoes in the continental U.S. There is no treatment and no vaccine against the virus, but “we are working very hard on that,” said Dr. Catherine Laughlin, Chief of Virology Branch at Division of Microbiology and Infectious Diseases in the National Institute of Allergy and Infectious Diseases (NIAID). Some experimental serums that protect mice have been tested but the research is in early stages.