Scientists are preparing to begin trials of an antibody treatment that could be used to protect older people from the coronavirus. Rhys Blakely writes in The Times that the hope is that a three-minute infusion of antibodies could ward off infection for up to six months. It could be an option where a more conventional vaccine is unsuitable, including for people whose natural defences are compromised by immunosuppressant drugs or chemotherapy. It could also be used to boost the immune systems of older people who are at a heightened risk.