“permanent relationship between migratory birds and bird flu has yet to be proven beyond a doubt”
– in case of H5N1, evidence is powerfully to the contrary.

Gotta wonder to what extent the “migratory birds did it” notion stays alive not because of science – which suggests otherwise – is due to corruption by poultry industry. Corruption of “science” itself; and perhaps even financial corruption.
Seems a little akin to global warming scepticism; take away energy industry money, and much of this would evaporate.