Zika virus is a flvivirus that was first isolated in 1947 from a sentinel rhesus monkey in a Ugandan forest, with the first human cases identified 5 years later in Nigeria. Humans become infected with Zika virus mainly through the bites of several species of Aedes mosquitoes, including Aedes aegypti and presumably Aedes albopictus.3 Eradication of Zika virus poses substantial challenges because of its sylvatic transmission cycle between Aedes mosquitoes and non-human primates. Although Zika virus is known to have circulated in parts of Africa and the Asia-Pacific c region, a series of epidemics during the past decade have transported this virus eastward across islands in the Pacific Ocean.