Confusion still seems to remain....perhaps with me.

Here is one of the better explanations of Avian Flu and Swine Flu. And here's what I sort of gleened from it.

Wild fowl are natural asymptomatic carriers of Avian Flu (Influenza A). Slaughter all the swine in China or the world and one still won't get rid of Influenza A. Slaughter all migrating wild ducks and geese in the world.....well maybe.   

The problem with the Influenza A virus is that it can infect mammals including horses, pigs etc. and humans and it is capable of antigenic shift.

Because swine can "catch" human viruses, avian viruses and their own (swine flu), they make a good receptacle within which the Influenza A can do its antigenic shift stuff and produce a new strain with the genetic bits of more than one virus, thus creating a totally new strain of Influenza A, to which humans have no immunity.

From what I read of the above link, it would seem logical that if Influenza A can do an antigenic shift within pigs, that are carrying more than one virus, Influenza A would also be capable of doing an antigenic shift within humans, who, like swine, can "catch" avian viruses, swine viruses and their own (influenza B and C). I've not seen anything to contradict this, but if I've misunderstood, please correct me. Its late and my brain hurts.      

The British Columbia outbreak had nothing to do with raising poultry and pigs in close proximity, nor do I suspect, did the outbreak in Virginia or The Netherlands. However, Avian flu in domestic flocks still occurred in those regions and in some instances spread to humans. If those humans happened to have had other viruses also, could the Influenza A virus also have had the potential within those humans, to produce a new pandemic strain by the same process as thought to occur in swine?

Further, more of a problem in China would seem to be their use of antiviral drugs for poultry with subsequent development of drug resistant strains of the avian flu virus.....one more variable to add to the pot.