The Race Against Avian Flu

thoughts.com — Public-health officials have been sounding the alarms, and now Washington has caught the bug. Meanwhile, scientists search for a vaccine.Most researchers think our luck won't hold?that as the trillions of flu viruses at loose in the world replicate and mutate, it's only a matter of time before one evolves the ability to spread by way of a cough.. Nov 28, 2007 View in Crawl 4