From the Centers for Disease Control and Prevention. Respiratory syncytial virus activity--United States, 1999-2000 season.
D004196:Disease Outbreaks; D006801:Humans; D011159:Population Surveillance; D018357:Respiratory Syncytial Virus Infections / Q000453:epidemiology*; D012136:Respiratory Syncytial Viruses / Q000302:isolation & purification; D012621:Seasons; D014481:United States / Q000453:epidemiology