MIT Technology Review's editor in chief on how to ease social distancing while waiting for a vaccine. "That means we have to prepare for a world in which there is no cure and no vaccine for a long time. There is a way to live in this world without staying permanently shut indoors. But it won't be a return to normal; this will be, for Westerners at any rate, a new normal, with new rules of behaviour and social organization, some of which will probably persist long after the crisis has ended." Gideon Lichfield explores.