




























Presentation by Nga, N.T.D., Hung, P.V., Hung Nguyen-Viet, Huyen, N.T.T., Nhuan, N.H., Giang Huong, Pho, N.V., Quang, B.V. and Trang, N.T.H. at a regional symposium on research into smallholder pig production, health and pork safety, Hanoi, Vietnam, 27–29 March 2019.