title: Update on Vaccine-Derived Polioviruses - Worldwide, January 2015-May 2016.
abstract: In 1988, the World Health Assembly resolved to eradicate poliomyelitis worldwide (1). One of the main tools used in polio eradication efforts has been the live, attenuated, oral poliovirus vaccine (OPV) (2), an inexpensive vaccine easily administered by trained volunteers. OPV might require several doses to induce immunity, but provides long-term protection against paralytic disease. Through effective use of OPV, the Global Polio Eradication Initiative (GPEI) has brought wild polioviruses to the threshold of eradication (1). However, OPV use, particularly in areas with low routine vaccination coverage, is associated with the emergence of genetically divergent vaccine-derived polioviruses (VDPVs) whose genetic drift from the parental OPV strains indicates prolonged replication or circulation (3). VDPVs can emerge among immunologically normal vaccine recipients and their contacts as well as among persons with primary immunodeficiencies (PIDs). Immunodeficiency-associated VDPVs (iVDPVs) can replicate for years in some persons with PIDs. In addition, circulating vaccine-derived polioviruses (cVDPVs) (3) can emerge in areas with low OPV coverage and can cause outbreaks of paralytic polio. This report updates previous summaries regarding VDPVs (4).
authors.forename: Jaume
authors.initials: J
authors.lastname: Jorba
authors.forename: Ousmane M
authors.initials: OM
authors.lastname: Diop
authors.forename: Jane
authors.initials: J
authors.lastname: Iber
authors.forename: Roland W
authors.initials: RW
authors.lastname: Sutter
authors.forename: Steven G
authors.initials: SG
authors.lastname: Wassilak
authors.forename: Cara C
authors.initials: CC
authors.lastname: Burns
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D005260:Female; D014943:Global Health / Q000706:statistics & numerical data*; D006801:Humans; D016867:Immunocompromised Host; D007223:Infant; D008297:Male; D011051:Poliomyelitis / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D017955:Poliovirus / Q000145:classification / Q000302:isolation & purification; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage / Q000009:adverse effects*; D012703:Serotyping; D012722:Sewage / Q000821:virology; D014613:Vaccines, Attenuated / Q000008:administration & dosage / Q000009:adverse effects
chemical_list: D011055:Poliovirus Vaccine, Oral; D012722:Sewage; D014613:Vaccines, Attenuated