Given how much the world has changed in 2020, it is hard to fathom that the year was just one leap-day longer than 2019. On January 16th The Economist published its first article about a novel coronavirus in Wuhan, China, which at that point had been confirmed only as the cause of 42 infections and one death. Two weeks later, covid-19 made its debut on our cover. It returned there on February 27th, and held the slot for ten consecutive issues. The topic has claimed seven more covers since then....