Rob Davies from theguardian said that Since the engineering firm Dyson unveiled a prototype ventilator that it said could help arm the NHS for a surge in Covid-19 patients, there has been scepticism about its role.
The billionaire entrepreneur Sir James Dyson is better known for his bagless vacuum cleaners, his backing for Brexit and more recently an attempt to build an electric car that he ultimately abandoned.
One ventilator expert, whose company Penlon is working with the Ventilator Challenge UK consortium, speculated that designing a new device and producing thousands rapidly was unrealistic.
Latest international news, sport and comment from the Guardian.