No abstract available
MeSH terms
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Acute Disease
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Child
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Child, Preschool
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Disease Outbreaks*
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Female
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Humans
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Immunization Programs
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Influenza Vaccines / administration & dosage*
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Male
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Respiratory Tract Infections / epidemiology*
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Respiratory Tract Infections / prevention & control
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Respiratory Tract Infections / virology
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Schools / statistics & numerical data
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United Kingdom / epidemiology
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Vaccine Potency