Progress Toward Polio Eradication — Worldwide, 2013–2014

Edna K. Moturi, MBChB; Kimberly A. Porter, PhD; Steven G.F. Wassilak, MD; Rudolf H. Tangermann, MD; Ousmane M. Diop, PhD; Cara C. Burns, PhD; Hamid Jafari, MD


Morbidity and Mortality Weekly Report. 2014;63(21):468-472. 

In This Article

Supplementary Immunization Activities

In 2013, 265 supplementary immunization activities (SIAs) using oral poliovirus vaccine (OPV) were conducted in 42 countries, 52% (137) in AFR and 45% (118) in EMR. These included 113 national immunization days, 134 subnational immunization days, 13 child health days, and five large-scale mop-up rounds. About 2.24 billion doses of OPV were administered over the year to a target population of mostly children aged <5 years; of these doses, 995 million were trivalent, 1.2 billion were bivalent (types 1 and 3) and 8 million were type 1 monovalent OPV. Short-interval additional dose SIAs[7] were implemented in Afghanistan to boost population immunity using monovalent OPV and/or bivalent OPV in hard-to-reach areas. An extensive set of outbreak response and preventive SIAs have been planned and conducted in the Middle East to respond to the WPV type 1 (WPV1) outbreak in Syria ( Table 1 ).