Switching from OPV to IPV: are we behind the schedule in Latin America?

Daniel Salas-Peraza, María L Avila-Agüero, Ana Morice-Trejos
2010 Expert Review of Vaccines  
doi:10.1586/erv.10.39 pmid:20450322 fatcat:p4vhab3o3nactkcu5zaxzueywq