The Nuance
The Latest Scientific Theories Around Covid-19 Brain Fog
Experts say the immune system’s reaction to SARS-CoV-2 could shift brain activity in ways that disrupt sleep-wake cycles
Corey McPherson knows that he contracted SARS-CoV-2 back in March. He also knows that by late April, when he turned 36, he’d mostly recovered from his acute symptoms — his fever and pain and breathing problems.
But if you ask him now to recall that time, he says that there’s not a lot he could tell you. It’s as if a page has been ripped out of his memory’s notebook. “I don’t remember much about when I was actually sick with it,” he says. “There are one or two blips, but I have almost zero recollection of that time. I still forget a lot of things.”
McPherson lives in Detroit and works in IT. Pre-Covid, he exercised almost every day and was healthy. His mind was sharp. “I was the guy who remembered everything,” he says. “But my memory is horrible now.” He struggles sometimes to come up with simple words or to finish sentences, and he often feels disoriented. “I often find myself in a dream-like state, and I have to snap back into reality,” he says. “At first I thought this was just a hiccup in my recovery, but now it’s been six months and it’s not getting…
