That implies an assumption, that the current H5N1 virus, when and if it does mutate in to a human virus, would obligingly do so, in exactly the same form that its ancestor virus did, a hundred years ago!
With the pigs and other mammals, in addition to all kinds of birds succumbing to the H5N1 virus, it is any one's guess as to what the mutated human virus, (if and when it appears) will be made of!
That is why, all of the currently produced/promoted vaccines are no more than shots in the dark, against an enemy still hidden from all of us.
It is with great disappointment that I note, that even the most respected of sources related to the H5 N1 virus on the web, fail to adequately highlight this obvious fact!
We have today added the "Vaccine created for deadly flu of 1918" post of your blog to The-Best-Bird-flu-Blogs section of our site.