Scientists Lift Moratorium A Year After Tests Were Suspended Over Terror Fears

Experiments with a deadly flu virus, suspended last year after a fierce global debate over safety, will start up again in some laboratories, probably within the next few weeks, scientists say. The research touched off a firestorm in 2011 when it became known that two groups, one in the Netherlands and another in the United States, had genetically altered a dangerous bird flu virus to make it more contagious in mammals. Scientists warned that a deadly pandemic could break out if the mutant virus leaked out of the lab accidentally or if terrorists stole it or made it themselves, using articles in scientific journals for the recipe.