Hugo, I checked the second post and link now.
Seems like it's fairly standard virology research, if you would ask me?
The sentence you quoted seemed a little taken out of context, no offence.
Separately, the scientists used gene splicing to create a hybrid H5N1/H3N2 virus. In other words, rather than letting nature take its course and seeing if the viruses would reassort, they guaranteed that reassortment occurred.
It was followed by this:
They found these hybrids also did not pass easily between the animals. Moreover, ferrets injected with the reassorted virus showed symptoms less severe than those with the pure avian flu. Reassortment appears to have weakened the virus.
In a final study, CDC researchers passed a hybrid virus through a series of ferrets to see if it would accumulate genetic changes necessary to transmit more easily. This tested the mutation factor. The scientists found this introduced only one genetic change in the virus but didn't enhance its transmissibility.
If you recall, there were a big scare a few years ago about the dangers of the bird flu, since it's very lethal.
At first, it seemed like it could be the next plague.
The big threat.
But it was shown that in it current form, the bird flu was very hard for humans to contract.
So that's how I read this article. Scientists are researching how to battle future types of flus.
FWIW, I know the emergency health care here in Sweden is planning for if a mutated form of the bird flu does break out.
And I also know that the current vaccine for the swine flu is only but a slight variation of the bird flu vaccine.