In two early studies, researchers said some patients showed signs of healing just weeks after leaving the hospital.

Lingering shortness of breath and diminished stamina have dogged many COVID patients whose lungs were viciously attacked by the coronavirus. Early in the pandemic, doctors worried that Covid might cause irreversible damage leading to lung fibrosis — progressive scarring in which lung tissue continues to die even after the infection is gone.

At a recent European Respiratory Society meeting, doctors presented early results of a few small studies that offered a glimmer of hope, indicating that in at least some cases, patients’ lungs show signs of recovery especially with intensive aftercare and exercise.

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