Studies suggest that people who had seasonal flus or vaccinations have low antibody levels against H5N1 bird flu.

The H5N1 bird flu has been spreading widely among wild birds, poultry and other animals around the world for several years, and starting early last year became a problem in people and cows in the U.S.

It is the stuff of science fiction: scientists tamper with a killer bird flu virus and create something much worse. But what has been created in a Rotterdam laboratory is not fiction. It is deadly ...