Clinical research and longitudinal studies demonstrate that post-acute sequelae of COVID-19 (Long COVID) can persist for many months or even over a year in a subset of patients.
The claim is specific, empirical, and testable. Multiple retrieved longitudinal studies (e.g., papers [3] and [9]) explicitly evaluate symptom persistence over 12 to 22 months, confirming that various COVID-19 symptoms can last for months or over a year. Therefore, the evidence clearly supports the claim.