A new model from The Economist indicates that Covid-19 has claimed millions more lives than official numbers suggest. Can enough vaccine supplies reach poorer countries to prevent millions more deaths? Data journalist Sondre Solstad reveals the untold story of the pandemic. Robert Guest reports from Mexico, one of the countries hardest hit. COG-UK’s Sharon Peacock, a top “variant hunter”, says vaccines are beating back new strains. Alok Jha and Natasha Loder are joined by Oliver Morton, The Economist’s briefings editor. For full access to The Economist’s print, digital and audio editions subscribe at economist.com/thejabpod. Sign up for our new weekly science and data newsletters at economist.com/simplyscience and economist.com/offthecharts   See acast.com/privacy for privacy and opt-out information.