Although SARS-CoV-2 probably does not infect the brain, it can damage it significantly, a new study of autopsies of 41 COVID-19 patients finds.Researchers at Columbia University say that they found no signs of virus inside the patients' brain cells but saw many brain abnormalities that could explain the confusion and delirium seen in some patients with severe coronavirus and the lingering "brain fog" in those with mild disease.The study, which the authors called the largest COVID-19 brain autopsy report thus far, involved analysis of samples from autopsies conducted from March to June 2020 and was published late last week in Brain.