Apparently the Avian Flu (see below) lacks the ability to be transmitted from human to human. All cases have so far been from bird to human (hence the name...).
I am not completely comforted by this. Influenza virii change protein coats the way I change my shirt. The ability of Avain Flu to jump human-to-human is just a few seasons away. Its mortality rate is ~50% and the vaccine manufacturers are pounded daily by the groups for giving their children autism.
...It [Asian flu] kills 100 percent of the domesticated chickens it infects, and among humans the disease is also lethal: as of May 1, about 109 people were known to have contracted it, and it killed 54 percent (although this statistic does not include any milder cases that may have gone unreported). Since it first appeared in southern China in 1997, the virus has mutated, becoming heartier and deadlier and killing a wider range of species. According to the March 2005 National Academy of Science's Institute of Medicine flu report, the "current ongoing epidemic of H5N1 avian influenza in Asia is unprecedented in its scale, in its spread, and in the economic losses it has caused."
In short, doom may loom. But note the "may." If the relentlessly evolving virus becomes capable of human-to-human transmission, develops a power of contagion typical of human influenzas, and maintains its extraordinary virulence, humanity could well face a pandemic unlike any ever witnessed. Or nothing at all could happen. Scientists cannot predict with certainty what this H5N1 influenza will do. Evolution does not function on a knowable timetable, and influenza is one of the sloppiest, most mutation-prone pathogens in nature's storehouse.
Worry will continue...