Vigilance needed.  [electronic resource] 

 -  Nature  Jan 2013 
 - 451-2 p.  digital 
<br/><br/> Publication Type: Editorial 
<br/><br/><label>ISSN: </label>1476-4687 
<br/><br/><label>Standard No.: </label>10.1038/493451b  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biohazard Release--prevention & control<br/>Bioterrorism--prevention & control<br/>Guidelines as Topic<br/>Humans<br/>Influenza A Virus, H5N1 Subtype--genetics<br/>Influenza, Human--prevention & control<br/>Risk Assessment--standards<br/>Security Measures--standards<br/>World Health Organization