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Comparison of microglial activation between the brains of cases and controls. (A) In the frontal lobe, microglial activation (innate immunity) did not differ between COVID-19 cases and controls; (B) Comparison of pontine microglia between COVID-19 cases and control cases by a box plot showed a significantly greater microglial activation in the pons of COVID-19 cases (p = 0.017).
