1. Pan American Health Organization. Zika cases and congenital syndrome associated with Zika virus reported by countries and territories in the Americas, 2015–2017 cumulative cases [cited 2017 Dec 14]. http://www.paho.org/hq/index.php?option=com_docman&task=doc_view&Itemid=270&gid=42362&lang=en
2. Center for Disease Control and Prevention. Pregnant women with any laboratory evidence of possible Zika virus infection, 2015–2017 [cited 2017 Dec 14]. https://www.cdc.gov/zika/reporting/pregwomen-uscases.html
3. Center for Disease Control and Prevention. Cumulative Zika virus disease case counts in the United States, 2015–2017 [cited 2017 Dec 14]. https://www.cdc.gov/zika/reporting/case-counts.html
4. The global threat of Zika virus to pregnancy: epidemiology, clinical perspectives, mechanisms, and impact.;Boeuf;BMC Med,2016
5. Houston Airport System. Media kit fact sheet [cited 2017 Dec 14]. http://www.fly2houston.com/newsroom/media-kit/fact-sheets/