Hepatitis E in southern Vietnam: Seroepidemiology in humans and molecular epidemiology in pigs by Berto, A, Pham, H, Thao, T, Vy, N, Caddy, S, Hiraide, R, Tue, N, Goodfellow, I, Carrique-Mas, J, Thwaites, G, Baker, S, Boni, M, VIZIONS consortium