From the Centers for Disease Control and Prevention. Influenza activity--United States and worldwide, April-October 2000.
D014943:Global Health; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D009981:Influenza B virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology; D014481:United States / Q000453:epidemiology