Doctors have studied the brain of a father-of-two who became the youngest reported patient in the world to have a stroke due to coronavirus.
Omar Taylor, 31, spent six weeks at Colchester General Hospital with coronavirus, pneumonia, sepsis, respiratory failure and a stroke.
His recovery amazed doctors and his family, who described it as a "miracle" when he walked out of the hospital.
Mr Taylor said he hoped his case could benefit future treatment of patients.
The case has helped medics understand how the virus affects the brain.
Stroke consultant Dr Joseph Ngeh cared for Mr Taylor and co-authored the report for the British Journal of Hospital Medicine.
He said he hoped it raised awareness about the potential risk of Covid-19 patients having a stroke.
"Omar is the youngest patient we have found in medical literature to have had a stroke caused by the virus," he said.
"His case is very intriguing and I will remember it for the rest of my life.
"We are learning more about the virus every day and we now know it can cause an inflammatory response which can lead to a stroke, even for very young patients, like Omar."
Mr Taylor's brain imaging showed unusual features in such a young patient who had no previous stroke risk factors, he added, with "multiple microbleeds" suggesting a Covid-19-induced "cytokine storm".
"He had the most severe stroke you can have and his brain was being attacked on both sides," Dr Ngeh said. "The vast majority of patients would need 24-hour care after this sort of stroke."
Mr Taylor told the BBC: "I am very happy that the team of doctors were so interested in my case and I hope it can benefit doctors in the future when treating patients who are in a similar critical condition to me and save lives like they did mine."
He spent 20 days on a ventilator in intensive care before he was transferred to the stroke unit and eventually discharged.
A fundraising page created by a friend has raised nearly £19,000, which the family is using to fund daily therapy sessions at home in Rowhedge, near Colchester.
His wife Kaitlyn, who has been training to be a nurse at the hospital, said she was "incredibly proud" of him.
Mr Taylor has been left with a weak right hand and limited speech but has "really improved" and is "working so hard," she said.
He is hoping to return to his job as a regional director of Care UK soon.