Abstract
Influenza activity in the United States began to increase in mid-November and remained elevated through February 8, 2014. During that time, influenza A (H1N1)pdm09 (pH1N1) viruses predominated overall, while few B and A (H3N2) viruses were detected. This report summarizes U.S. influenza activity* during September 29, 2013-February 8, 2014, and updates the previous summary.
MeSH terms
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Adolescent
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Adult
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Age Distribution
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Aged
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Child
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Child, Preschool
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Drug Resistance, Viral
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Female
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Hospitalization / statistics & numerical data
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Humans
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Infant
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Influenza A Virus, H1N1 Subtype / drug effects
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Influenza A Virus, H1N1 Subtype / isolation & purification*
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Influenza A Virus, H3N2 Subtype / drug effects
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Influenza A Virus, H3N2 Subtype / isolation & purification*
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Influenza B virus / drug effects
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Influenza B virus / isolation & purification*
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Influenza, Human / epidemiology*
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Influenza, Human / mortality
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Male
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Middle Aged
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Outpatients
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Population Surveillance*
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Pregnancy
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United States / epidemiology
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Young Adult