Biological terrorism could kill more people than nuclear attacks, Bill Gates to warn world leaders

Bioterrorists could one day kill hundreds of millions in an attack more deadly than nuclear war, Bill Gates will warn world leaders.Rapid advances in genetic engineering have opened the door for small terrorism groups to tailor and easily weaponise disease viruses.A resulting pandemic is currently one of the most deadly threats faced by the world, he believes, yet governments are complacent about the scale of the risk.