After a record 112 days on a specialized life-support system, a South Korean COVID-19 patient is recovering from double lung transplant surgery, doctors say, in only the ninth such procedure worldwide since the coronavirus outbreak began.

The 50-year-old woman was diagnosed with the disease and hospitalized in late February and then spent 16 weeks on extracorporeal membrane oxygenation (ECMO) support, which involves circulating a patient's blood through a machine that adds oxygen to red blood cells.

That's the longest that any COVID-19 patient in the world has spent on ECMO support, her doctors said.