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The degree of microglial activation in brain areas (A) and whole brainstem (B). (A) Microglial grading in COVID‐19 and non‐COVID cases per areas. (B) Comparison of microglial grading from the whole brainstem (midbrain+pons+medulla) between COVID‐19 and non‐COVID cases. Small circles represent out values, stars show far out values. FCGM, frontal cortical gray matter; FWM, frontal white matter; HC, hippocampus; MB, midbrain; MO, medulla oblongata
