Pertinently, a major feature of active sarcoidosis is fatigue experienced by up to 80% of those affected. Sarcoidosis-associated fatigue is globally recognized as a severely disabling symptom.9 Sarcoidosis is associated with an elevated serum angiotensin converting enzyme (ACE) level.10 Here, we report on a patient with PACS (not hospitalized and did not require supplemental oxygen) causing severe fatigue, ‘brain fog’ and dyspnoea 5 months after his initial acute COVID-19 infection. The patient underwent several tests including a serum ACE level and a computed tomography (CT) chest (Figure 1 below). The serum ACE was elevated at 121 µ/l—normal 0–65 µ/l.