Worrying, and the authorities are wise to contain it as best they can. However, on the Agonist website and other pages, they spell out mutations of H5N1 and how they differ. Some are much more dangerous to humans than others.
We have had outbreaks of bird flu here in Texas, but with rigorous measures as far as slaughtering the affected chickens and burning the remains, they have been stopped. I think the real danger is in places where each animal represents food or income to the people involved, and so they are reluctant to kill anything that might be put to use.