Jiang, Qing-Wu <br/><br/>
[Influenza A (H1N1) is not a novel disease].  [electronic resource] 

 -  Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine]  Jul 2009 
 - 551-2 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0253-9624 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humans<br/>Influenza A Virus, H1N1 Subtype<br/>Influenza, Human--epidemiology