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photographicprint, pictorialworks, physicianadministers, oralvaccine, child, cry, mother, poliomyelitisprevention, control, vaccination, africa, poliovirusvaccine, oral, administration, dosage, africancontinentalancestry, imagesfromthehistoryofthepublichealthservice, ronaldjkostraba, parklawnconferencecenter, 1989, oralpoliovaccine, childreninafrica, stillimage, publicdomain, freeimages, printsandphotographs, nationallibraryofmedicine, nlm, ihm, nationalinstitutesofhealth, nih, archivesofmedicine, nlmdigitalcollection
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