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H5N1 is seen as a candidate for jumping that species barrier, and entering into a new environment where it has not yet found a balance. It is still highly speculative as to whether it will successfully jump that barrier (although the flu virus is well known for jumping between species), but nonetheless people do panic over the possibility it might do so.
Due to the high lethality and virulence of HPAI A(H5N1), its endemic presence, its increasingly large host reservoir, and its significant ongoing mutations, the H5N1 virus is the world's largest current pandemic threat, and billions of dollars are being spent researching H5N1 and preparing for a potential influenza pandemic
barely noticable! not too many people keep chickens any more, and the farms keep them in sheds mainly. I've not been past the turkey farm lately, but I expect it to be fairly quiet. cows on the other hand live in fields, that have public footpaths going through them. much greater chance of spreading an infection. my nan used to have chickens in the back garden, it used to be relatively common. I think I might even remember them vaaguely. i guess things would have been a bit different with H5N1 back then.
I think restriction would and should be a lot more extensive for a viral outbreak. Especially H5N1.
Don't we have better quality beef now because of the BSE scare?