The global spread of epidemic Zika virus (ZIKV) began in Micronesia in 2007, followed by epidemics in French Polynesia in 2013–2014, other South Pacific islands in 2014–2015, and the Americas in 2015–2016 [1]. Only 14 human infections were confirmed before 2007 [1], but by early March 2016, 52 countries and Territories of the Americas, Africa, Asia and Pacific had reported autochthonous ZIKV transmission [2].