Two years after Brazil's northeast was hit with Zika, epidemiologists and other experts continue to grapple with big questions.
Zika cases have plummeted in Latin America and the Caribbean, resulting in fewer infected people entering the US.
As of August 7, Florida had 128 reported Zika infections this year, up from 116 reported a week earlier.
There are currently no licensed Zika vaccines.
Health officials believe the Hidalgo County resident acquired the virus locally.
The antibody-based assay can determine if an infection is caused by Zika virus or another virus of the same family, such as dengue and West Nile.
The source of a Utah man’s Zika infection remains unknown but person-to-person transmission is the most likely culprit.
Health authorities have sent a mosquito eradication team to spray 667 houses in the infected area.
Researchers are investigating how the Zika virus is able to find a safe harbor in a host's tissue and stage a rebound weeks after the virus was thought to have been cleared by the immune system.
A new study suggests the Zika virus was in Brazil as early as 2012, two years before human cases were identified.