influenza A H1N1 influenza

Influenza A(H1N1) influenza critical type of secondary infection

2009 H1N1 influenza

2009 pandemic H1N1 influenza

2009 pandemic influenza A H1N1

2009 swine-origin influenza A(H1N1) virus

A H1N1 influenza

A H1N1 influenza virus

A new H3 influenza virus variant

A3 influenza

Aavian influenza

aH1N1 influenza

A-H1N1 influenza

aian influenza virus

aiv influenza virus

AIV influenza virus H5N1

anti-avian influenza virus AIV

Anti-avian influenza virus drugs

anti-avian influenza virus(AIV)