The flu-vaccine shortage never materialized, but that doesn't mean we're free from the flu yet. Health officials from around the world gathered in Vietnam last week to discuss a virulent form of bird flu that has already caused dozens of deaths in Asia. U.S. officials are moving quickly in case it spreads. Here's what you need to know.
Where has bird flu been found so far? Cases of the most powerful form of avian flu, caused by the H5N1 virus, have been reported in Hong Kong, China, Cambodia, Thailand and Vietnam.
Why are health officials so worried? There is currently no...