Stephen Cameron under treatment in Vietnam. (Photo: VOV)

Stephen Cameron, 42, from Motherwell, was Vietnam's sickest patient and became known nationwide as Patient 91.

"I'm a living example of what this virus can do and how it is serious," he told the BBC from his hospital bed in Scotland.

The pilot spent 68 days on a ventilator - most of which he was also reliant on an Ecmo machine, a form of life support only used in the most extreme cases.

Dr Manish Patel, the respiratory consultant has been responsible for Mr Cameron's care since his return to Scotland on 12 July told the BBC that Mr. Cameron surviving such a long time in a medically-induced coma was "exceptional".

Mr. Cameron narrowly avoided a double lung transplant when his lung capacity fell to 10%. He also suffered multiple organ failure.