A With vaccines spreading through rich countries at gathering speed and lockdown restrictions weakening with the spring sunshine, it’s tempting to believe that the long nightmare of Covid-19 is finally ending. In the UK, 58% of the adult population has received at least one dose of vaccine. In the US, President Joe Biden has doubled an original goal of administering 100 million shots in his first 100 days in office, which would bring the total to 200 million by the end of April. On Google, the search term “after Covid” has been getting more interest than “Covid symptoms” for the past month, suggesting the world is thinking more about what life will be like when things return to normal.