Outbreaks of avian influenza are killing both domestic poultry and wild birds across Asia and Europe. While the virus is lethal to about half of the humans who contract it from birds, pandemic has yet to occur because this influenza can't effectively transmit from person to person. Scientists are preparing for that to change. Learn how research teams are sampling migrating waterfowl as well as sequencing the deadly, long-dormant 1918 virus in an effort to stay ahead of the evolving avian flu. A goal of the race is to develop an efficient, effective vaccine for millions of people worldwide.