A committee that advises the government says that details of two controversial experiments on bird flu virus should not be made public, because of fears that the work could provide a recipe for a bioweapon.
The government-funded experiments were done by researchers who wanted to understand if bird flu virus might change in the future to cause a pandemic in people. By tweaking genes, they made the deadly bird flu virus more contagious between lab animals.
It's probably a bit too late for that. To read more, click here.