Presentation by Hung Nguyen-Viet, Wiku Adisasmito, Pattamaporn Kittayapong, Fang Jing, Xuan Tung Dinh and Phuc Pham Duc at the 4th International One Health Congress and 6th Biennial Congress of the International Association for Ecology and Health (One Health EcoHealth 2016), Melbourne, Australia, 3–7 December 2016.