CD68 and COVID-19: Microglial nodules associated with perineuronal HLA-DR+/TMEM119+/CD68+ cells were suggestive of neuronophagia in 18 COVID-19 subjects (Fig. 6a–h) and were identified at the level of the substantia nigra (N = 14), dorsal motor nucleus of the vagus (N = 12), medullary reticular formation (N = 9), area postrema (N = 6) and basal ganglia (N = 5); no microglial nodules were found in control cases, regardless of cause of death.