Demonstration of influenza virus, Type B, in a recent outbreak of upper respiratory infection.
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D004196:Disease Outbreaks; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology* / Q000706:statistics & numerical data*; D009975:Orthomyxoviridae; D012137:Respiratory System; D012140:Respiratory Tract Diseases; D012141:Respiratory Tract Infections