"However to date H5N1 has a mortality rate of 63 per cent in humans."

I doubt that that info (opinion) is accurate. I suspect they are counting only the known victims, and ignoring the rest. It has been estimated that many people who came into contact with the infected animals in high-density conditions actually came down with the disease, but weren't sick enough to go to the hospital.

But if they're just trying to cause a panic or something, that 63% will probably do for now.

Sue