I understand that to be the case. However, aren't they right now concerned about its mutation into a transmissible virus from chicken to human? Are you saying that measures taken to kill H5N1 (the 1919 mutation of the flu) have proven resistant???
There has been at least one strain that has proved resistant to one of the major antivirals. It might be one of the Vietnam strains...it was an Asian strain(s). Globally this H5N1 still has a 60 % case fatality rate. In Indonesia I read it jumps up near 80% CFR. If the changes in receptor binding continue towards more common flu types at this rate, we are up creek without a paddle.It will take many, many years before it has weakened down to the CFR of the 1918 flu. Here’s a lengthy public health bird flu blog and commentary with some very interesting comments near the bottom regarding the origin of this virus:
http://scienceblogs.com/effectivemeasure/2007/bhutto_and_who_bashing.php