We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleProgress toward interruption of wild poliovirus transmission--worldwide, January 2011-March 2012.AuthorsCenters for Disease Control and Prevention (CDC)PublicationMMWR. Morbidity and mortality weekly report, 2012, Vol 61, Issue 19, p353ISSN1545-861xPublication typearticle