https://www.wired.com/story/what-does-covid-19-do-to-your-brain/

During the third week of March, as the pandemic coronavirus that causes Covid-19 was beginning to grip the city of Detroit, an ambulance sped through its streets to Henry Ford Hospital. Inside, a 58-year-old airline worker struggled to understand what was happening to her. Like hundreds of other Covid-19 patients flooding the city’s emergency rooms, the woman had a fever, cough, and aching muscles. But something else was happening too; something that had made her suddenly disoriented, unable to remember anything but her name.

Doctors at Henry Ford tested the woman for Covid-19, and she came back positive. They also ordered CT and MRI scans. The images showed a brain aflame, its folds swelling against the patient’s skull. On the computer screen, white lesions dotted the grey cross-sectioned landscape—each one filled with dead and dying neurons in regions that normally relay sensory signals, regulate alertness, and access memories. On the screen they appeared white. But in the electrical grid of the patient’s brain, those areas had gone dark.