Update: influenza activity--United States, January 11-17, 2004.  [electronic resource] 

 -  MMWR. Morbidity and mortality weekly report  Jan 2004 
 - 35-7 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1545-861X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Adult<br/>Aged<br/>Child<br/>Child, Preschool<br/>Humans<br/>Infant<br/>Influenza A virus<br/>Influenza B virus<br/>Influenza, Human--epidemiology<br/>Middle Aged<br/>Population Surveillance<br/>United States--epidemiology