Evidence for henipavirus spillover into human populations in Africa. by Pernet, O, Schneider, B, Beaty, S, Lebreton, M, Yun, T, Park, A, Zachariah, T, Bowden, T, Hitchens, P, Ramirez, C, Daszak, P, Mazet, J, Freiberg, A, Wolfe, N, Lee, B