The effect of mass immunisation campaigns and new oral poliovirus vaccines on the incidence of poliomyelitis in Pakistan and Afghanistan, 2001–11: a retrospective analysis

por O'Reilly, Kathleen M, Durry, Elias, ul Islam, Obaid, Quddus, Arshad, Abid, Ni'ma, Mir, Tahir P, Tangermann, Rudi H, Aylward, R Bruce, Grassly, Nicholas C
Publicado 2012