It’s an interesting read and there’s more at the link. But I think this is the part most will find interesting.
Modest cognitive decline occurred with the original virus and with each viral variant, including B.1.1.529 (omicron). As compared with uninfected participants (control), cognitive deficit — commensurate with a 3-point loss in IQ — was evident even in participants who had had mild Covid-19 with resolved symptoms. Participants with unresolved persistent symptoms had the equivalent of a 6-point loss in IQ, and those who had been admitted to the intensive care unit had the equivalent of a 9-point loss in IQ. Of importance, these deficits were associated with many of the other symptoms that have been reported by persons with long Covid. The greatest deficits in cognitive function were associated with the original strain of the virus (before December 1, 2020) and the early B.1.1.7 (alpha) variant (from December 1, 2020, to April 30, 2021). Longer hospital stays and durations of acute illness were predictors of persistent global deficits. Memory, reasoning, and executive function (i.e., planning) tasks were the most sensitive indicators of impaired function, and scores on these tasks tended to correlate with brain fog. Vaccinations provided a small cognitive advantage. Reinfection contributed an additional loss in IQ of nearly 2 points, as compared with no reinfection.
Modest cognitive decline occurred with the original virus and with each viral variant, including B.1.1.529 (omicron). As compared with uninfected participants (control), cognitive deficit — commensurate with a 3-point loss in IQ — was evident even in participants who had had mild Covid-19 with resolved symptoms. Participants with unresolved persistent symptoms had the equivalent of a 6-point loss in IQ, and those who had been admitted to the intensive care unit had the equivalent of a 9-point loss in IQ. Of importance, these deficits were associated with many of the other symptoms that have been reported by persons with long Covid. The greatest deficits in cognitive function were associated with the original strain of the virus (before December 1, 2020) and the early B.1.1.7 (alpha) variant (from December 1, 2020, to April 30, 2021). Longer hospital stays and durations of acute illness were predictors of persistent global deficits. Memory, reasoning, and executive function (i.e., planning) tasks were the most sensitive indicators of impaired function, and scores on these tasks tended to correlate with brain fog. Vaccinations provided a small cognitive advantage. Reinfection contributed an additional loss in IQ of nearly 2 points, as compared with no reinfection.
