"'We are all playing Covid roulette,' wrote George Monbiot. 'The next infection could be the one that permanently disables you. I’ve been hit three times so far, and feel lucky still to be active. But I’ve lost a little every time: stamina, lung capacity, sleep, general fitness, however diligently I’ve exercised since. In all three cases, it seems, the infection has come from school. For families with school-age children, the chamber turns more often than for those without. ...The government still does almost nothing to make schools safe. There’s a powerful argument that just as cholera was stopped by cleaning the water, Covid will be stopped by cleaning the air.'"