The WHO says the is at from a deadly . They do not know what it looks like. They called it 'Disease X'. It could come from an micro-. Disease X could spread around the world before we know about it. The WHO is putting a of money into . It is preparing a for an outbreak. It said: "Disease X represents the that a serious international could be caused by [an unknown virus].
Disease X could come from many . An existing disease could get ; terrorists could make bio-; DNA-changing could make totally new viruses. The U.S. Centers for Disease Control and Prevention said: "Scientists estimate that...6 out of 10 known diseases in people are spread from ." Today, people live together and travel the more. This will make it for diseases to spread.