Of note, tissue macrophages and monocytes have been linked to pathology in adults infected with COVID-19.55 We found no significant difference in the number of brain macrophages (CD68 positive) in the cortex of haemorrhagic versus non-haemorrhagic samples (Fig. 4A and B), with only a small difference when compared to pre-pandemic controls (Fig. 4B and Supplementary Fig 10). The gene discussed is CD68; the disease is COVID-19.