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Abstract
Entities: Disease
Mesh: See more » HumansInfantLatin America/epidemiologyMexico/epidemiologyPan American Health OrganizationPoliomyelitis/epidemiologyPoliomyelitis/prevention & controlPoliovirus Vaccine, OralPopulation SurveillanceSouth America/epidemiology
Substances: See more » Poliovirus Vaccine, Oral
Year: 1990 PMID: 2116586
Source DB: PubMed Journal: MMWR Morb Mortal Wkly Rep ISSN: 0149-2195 Impact factor: 17.586