Flu season is just around the corner once again. But this time, it may be coming disguised as a serial killer. There is wakeless concern that a new killer flu, nicknamed "Bird Flu," may mix with ordinary flu and kill millions of people. This is how Robert Webster of St. Jude Children's Research Hospital in Memphis characterizes this killer flu -- and take note that Dr. Webster has been studying influenza for the past 40 years: "This virus right from scratch is probably the worst influenza virus, in terms of being highly pathogenic, that I've ever seen or worked with." Public health experts, including those at the international Health Organization, fear a catastrophe.