Scientists from the WHO say the world could be at from a deadly disease. They do not know its or what it does. They have called it 'Disease X'. It could come from a virus or -organism that scientists don't know about. Disease X could go unnoticed until it is too , when it is spreading around the . The WHO says the threat is . It is putting a lot of money into . It is preparing a plan for an . It said: "Disease X represents the knowledge that a international epidemic could be caused by a [virus] currently ."
Disease X could come from sources. It could come from existing diseases becoming enough against our vaccines; it could come from and bio-; it could also come from DNA-changing technology that makes new viruses. The U.S. Centers for Disease Control and Prevention said: "Scientists estimate that more than 6 out of 10 known diseases in people are spread from animals." Today, live closer together in cities. There is international travel and . These will make it easier for diseases to spread.