A century ago, celebrations marking the end of the First World War were cut short by the onslaught of a devastating disease - the 1918-19 influenza pandemic. It became known as 'Spanish Flu' after its effects were reported in Spanish newspapers, but rapidly spread across the globe to become one of the worst natural disasters in human history. Explore what we have learnt about Spanish Flu, the urgent threat posed by influenza today and how scientists are preparing for future pandemics in our new