From Wired Magazine

A new strain of swine flu shows that the pandemic version has jumped from humans back to pigs, where it’s evolving in new and unpredictable ways.[...]
“Hoping for the best while preparing for the worst seems a sensible strategy,” said University of Hong Kong virologist Malik Peiris. The strain is described June 18 in Science.

Yi Guan, a scientist who as instrumental in limiting the SARS oiutbreak as well as an outspoken critic of WHO’s handling of the 2009 H1N1 outbreak, has clamied that further mutation, plus a reassortment with other strins, like the H5N1, which he claims is widespread everywhere but North America, would be “super nightmare for the whole world.”

When pressed further by sciencemag.org, Yi Guan is quoted as saying:

If that happens, I will retire immediately and lock myself in the P3 lab. H5N1 kills half the people it infects. Even if you inject yourself with a vaccine, it may be too late. Maybe in just a couple hours it takes your life.