A recent study conducted by the University of Turku has revealed that patients suffering from long COVID do not exhibit widespread brain inflammation, a condition previously thought to be a primary cause of lingering symptoms. Instead, the research found that those with more severe symptoms showed heightened brain activity in regions associated with mood and emotion, such as the hippocampus and amygdala. The study included 14 long COVID patients, 11 healthy individuals, and 13 multiple sclerosis patients, utilizing advanced brain imaging techniques like PET and MRI scans. Notably, there were no significant inflammatory markers in long COVID patients compared to healthy controls. The researchers observed that inflammatory activity might be more pronounced shortly after infection but tends to decrease over time. These findings challenge the notion that persistent brain inflammation is the main driver of long COVID symptoms, suggesting that treatments should focus on stress management and emotional regulation instead.