Objective To co-infect miniature pigs with influenza A virus A/California/7/2009 with A/Brisbane/10/07 and A/Shenzhen/406H/06 virus,respectively,and to verify whether the co-infection of A/California/7/2009(CA7) and A/Brisbane/10/07(H3N2) or A/California/7/2009 and A/Shenzhen/406H/06(H5N1) influenza viruses will induce mutation in influenza virus.Methods To co-infect the 5-6 month old miniature pigs with A/California/7/2009(CA7) and A/Brisbane/10/07(H3N2) or A/California/7/2009 and A/Shenzhen/406H/06(H5N1) ...