Rajinder Singh, 38, was put on to ECMO, an artificial lung, after other ventilation attempts failed.
The prime minister queries those who think there is something "dodgy or rum or weird or sleazy" about securing more ventilators in a pandemic.
By Ruth Clegg
By Rachel Schraer
As Boris Johnson continues to be treated for coronavirus in an ICU, we take a look at how they work.
By Michelle Roberts
Health editor, BBC News online
More than 600 health and social care workers have died from the coronavirus pandemic.
By Aled Scourfield
By Neil Prior