title: From the Centers for Disease Control and Prevention. Update: respiratory syncytial virus activity--United States, 1993.
mesh_terms: D004196:Disease Outbreaks / Q000706:statistics & numerical data; D006801:Humans; D018357:Respiratory Syncytial Virus Infections / Q000453:epidemiology*; D012136:Respiratory Syncytial Viruses / Q000302:isolation & purification*; D012621:Seasons; D014481:United States / Q000453:epidemiology