[It is suggested] COVID-19 can accelerate the decline of cognitive ability equivalent to ten years of normal aging, especially after severe COVID disease or severe long COVID." Human cognition has gradually declined since 2020, though humans cannot recognize it well owing to the cognitive decline.

Why does COVID-19 cause brain fog? Scientists may finally have an answer.

Nearly 40 percent of long COVID patients suffer from the disorienting condition. Destroyed connections between brain cells may be to blame.

Can we get an unpaywalled source