CDC calls bird flu single biggest threat to the world; death toll could be in tens of millions

• Avian flu poses the single biggest threat to the world right now and health officials may not yet have all the tools they need to fight it, the head of the Centers for Disease Control and Prevention said on Monday.
• Vaccine efforts are still focused on garden-variety influenza, which kills 36,000 Americans every year, and it would be impossible, in case of an avian flu epidemic, to switch gears quickly to make a special avian flu vaccine, CDC Director Dr. Julie Gerberding said.
• "This is a very ominous situation for the globe," Gerberding told a meeting of the American Association for the Advancement of Science, calling it the "most important threat that we are facing right now."
• "I think we can all recognize a similar pattern probably occurred prior to 1918," she said, referring to the 1918 pandemic of influenza, which also passed from birds to people and killed between 20 million and 40 million people globally.
• The H5N1 avian flu, which first appeared in Hong Kong in 1997 and has since popped up twice, is evolving and can jump directly from birds to people, killing an estimated 72 percent of diagnosed victims, Gerberding said.
• Gerberding said influenza was far more infectious than severe acute respiratory syndrome or SARS, which swept out of China in 2003, killing 800 people and causing global concern before it was stopped.
• Health experts have also pointed out influenza kills much faster than diseases such as AIDS, taking tens of millions of lives in the space of weeks or months.
• "We have this highly pathogenic strain circulating widely in poultry and ducks.
• There are really wonderful opportunities for this virus to either reassort (mix) with human strains of influenza or with other avian species," she said.
• Hong Kong authorities stopped H5N1 in 1997 by sacrificing much of the poultry population in the territory.