The wrongly called ‘Spanish’ flu was so economically and medically devastating that in 1919, most predictions for the world’s future were very gloomy indeed. However, the ensuing decade was characterised by remarkable economic growth and came to be known as the ‘Roaring 1920s’. Human beings tend to base projections of the future on current circumstances. If we are euphoric, we project a brilliant future and if depressed, a dark one. The example of 1919 brings us to consider how we should anticipate the post-COVID world.