Medical experts have revealed that the flu is the most likely cause of the next global pandemic, according to a new study. The majority of infectious disease experts from around the world have ranked influenza as the top pathogen of concern in terms of its potential to spark a pandemic. Second on the list was an illness ominously dubbed 'Disease X', while others highlighted as potential causes included Coronavirus, Ebola , the original SARS virus from the early 2000s and Crimean-Congo