Half of long COVID patients see meaningful symptom improvement within three years

A prospective cohort study found that about half of people living with long COVID a year after their initial COVID-19 infection experienced a meaningful symptom improvement within three years, whereas a quarter experienced a complete remission. While the study shows that long COVID recovery is often gradual, the findings suggest a need for placebo-controlled studies examining therapeutic interventions given the large number of adults living with this condition. The study is published in Annals of Internal Medicine.

Researchers from Massachusetts General Hospital and colleagues followed 1,019 adults in the RECOVER-Adult cohort with likely long COVID 12 months after initial COVID-19 diagnosis to evaluate the likelihood of improvement in symptoms.

Investigators tracked participants' symptoms over time via a commonly used long COVID research index, and assessed how many experienced sustained improvement, major symptom reduction, or complete remission of symptoms. By two years after initial infection, 36.2% of patients experienced a sustained symptom improvement, and by three years, 50.1% of participants experienced a sustained symptom improvement.

Also by three years, 56.4% experienced substantial symptom reductions along with a good quality of life, and nearly 26.9% experienced complete remission. The findings suggest that recovery is possible for many patients, but they also highlight the need for clinical trials to develop effective treatments for those whose symptoms persist.

Reference:

Harrison T. Reeder, Sarah E. Donohue, Jeffrey N. Martin, et al. Timing of Long COVID Improvement in Prospectively Followed RECOVER-Adult Participants. Ann Intern Med. [Epub 3 November 2026]. doi:10.7326/ANNALS-25-05275