Perera, H.K.K.; Vijaykrishna, D.; Premarathna, A.G.; Jayamaha, C.J.; Wickramasinghe, G.; Cheung, C.L.; Yeung, M.F.; Poon, L.L.; Perera, A.K.; Barr, I.G.; Guan, Y.; Peiris, M.
(Centers for Disease Control and Prevention (CDC), 2014)
After multiple discrete introductions of influenza A(H1N1)pdm09 virus into Sri Lanka, the virus was transmitted among humans, then swine. The spread of virus between geographically distant swine farms is consistent with ...