Is the United States prepared for an avian flu pandemic? Over the past few weeks, headlines about the avian flu have appeared in several media outlets, fueling confusion and concern among many people.

A new computer virus that lures victims the same way phishing e-mails do is on the loose, antivirus firms say. Potential victims get an e-mail saying their credit card has been charged $175 by PayPal, ...

Preparing vaccines and therapeutics that target a future mutant strain of H5N1 influenza virus sounds like science fiction, but it may be possible, according to a team of scientists at the National ...