No abstract available
MeSH terms
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Adolescent
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Adult
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Aged
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Aged, 80 and over
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Child
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Child, Preschool
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Humans
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Infant
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Infant, Newborn
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Influenza Vaccines / administration & dosage*
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Influenza Vaccines / adverse effects
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Influenza, Human / immunology
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Influenza, Human / prevention & control*
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Middle Aged
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Risk Factors
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Romania / epidemiology
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Seasons
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Sentinel Surveillance
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Vaccination / statistics & numerical data*