No abstract available
MeSH terms
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Child, Preschool
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Humans
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Infant
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Orphanages*
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Poliomyelitis / complications
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Poliomyelitis / epidemiology
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Poliomyelitis / prevention & control*
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Poliovirus Vaccine, Inactivated / adverse effects
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Poliovirus Vaccine, Inactivated / immunology*
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Risk
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Romania / epidemiology
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Vaccines, Inactivated / adverse effects
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Vaccines, Inactivated / immunology
Substances
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Poliovirus Vaccine, Inactivated
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Vaccines, Inactivated