title: Vaccine-derived polioviruses detected worldwide, January 2008-June 2009.
mesh_terms: D002648:Child; D005260:Female; D014943:Global Health; D006801:Humans; D016867:Immunocompromised Host; D007223:Infant; D008297:Male; D011051:Poliomyelitis / Q000453:epidemiology* / Q000276:immunology / Q000821:virology; D017955:Poliovirus / Q000145:classification; D023321:Poliovirus Vaccines / Q000276:immunology
chemical_list: D023321:Poliovirus Vaccines