CDC Scientist Kept Quiet About Flu Blunder - Report

"A government scientist who accidently mixed a deadly strain of bird flu with a tamer strain and sent the mix to other labs kept silent about the potentially dangerous lab blunder, according to an internal investigation. The accident happened in January at the headquarters of the Centers for Disease Control and Prevention in Atlanta. No one was sickened by bird flu. But unsuspecting scientists worked with the viral mix for months before it was discovered."