MeSH terms
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Acute Disease
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Adult
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Aged
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Female
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Humans
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Influenza Vaccines / administration & dosage
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Influenza, Human / epidemiology*
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Influenza, Human / prevention & control
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Islam*
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Male
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Middle Aged
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Respiratory Tract Infections / epidemiology*
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Saudi Arabia / epidemiology
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Seasons*
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Travel