https://www.theguardian.com/technology/2020/mar/26/from-vacuum-cleaners-to-ventilators-can-dyson-make-the-leap > The firm has no medical expertise, but it does have some relevant experience > Since the engineering firm Dyson unveiled a prototype ventilator it said could help prepare the NHS for a surge in Covid-19 patients, there has been scepticism about its role.