Long COVID’s brain fog finally has a biological explanation: Dopamine loss | Fortune0

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• September 14, 2026

For years, long COVID has been defined almost entirely by what patients report feeling: fatigue, brain fog, memory lapses, a loss of motivation that won’t lift. Doctors have struggled to treat a symptom with no clear physical marker, and the condition has reshaped workplaces as employers scramble to accommodate it. But despite the shared symptoms,