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Table 1 Regularity of the H1N1 subtype swine influenza viruses in China mainland from 1992 to 2011 in the separation time and region

From: Phylogenetic diversity and genotypic complexity of H1N1 subtype swine influenza viruses isolated in Mainland China

 

Total number

Year

  

1991

2001

2002

2004

2005

2006

2007

2008

2009

2010

2011

Beijing

4

2

      

2

   

Fujian

3

      

1

2

   

Guangdong

56

 

2

1

 

2

7

 

4

14

26

 

Guangxi

1

          

1

Henan

1

     

1

     

Hubei

5

        

5

  

Jiangsu

2

          

2

Liaoning

1

     

1

     

Nanchang

4

         

4

 

Shandong

12

       

9

3

  

Shanghai

3

    

3

      

Tianjin

1

   

1

       

Zhejiang

1

      

1

    
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Virology Journal

ISSN: 1743-422X